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Home Network Video Recorder Series. Select Series. Search Reset. Categories FRS. FRS Server. LED Displays. Constant Voltage. DS Series Decoder. Video Door Phone. Solid State Drive. Coaxial Cable. Inspection Product. X-Ray Baggage Scanner. Network Camera. Analog Camera. Thermal Camera. Network Video Recorder. Digital Video Recorder. Sort By Latest Products. Add to Compare. Up to 16 network cameras can be connected. Support live view, storage, and playback of the connected camera with up to the resolution of 6 megapixels.
New GUI and support starting record with one key Holiday recording Reali e instant playback for assigned channel during multi-channel display mode. Up to ch synchronous playback at 4CIF resolution. Customi ation of tags, searching, and playing back by tags.
Locking and unlocking record files. Support HDD quota mode different capacity can be assigned to different channel. Support enabling H. See Product Details. New GUI and support starting record with one key. Sorry, there was a problem saving your cookie preferences. Try again. Accept Cookies Customise Cookies. Consider these available items. Loading recommendations for you. Adding to basket Added to Basket.
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Click the OK button to save the settings and exit the menu. The S. Self-Monitoring, Analysis and Reporting Technology is a monitoring system for HDD to detect and report on various indicators of reliability in the hopes of anticipating failures. Settings Steps: 1. Enter the S. T Settings interface. Select the HDD to view its S. T information li…. Enter Video Tampering interface of Camera Management and select a channel you want to detect video tampering.
Set the video tampering handling method of the channel. Drag the sensitivity bar and choose a proper sensitivity level. Use the mouse to draw an area you want to detect…. If not, please contact the manufacturer of the IPC. Verify the setting parameters are correct. NVR supports G Edit the Motion Detection Record Schedule. For the detailed information of schedule configuration, see Chapter Configuring Record Schedule.
After the time settings, click Next button which takes you back to the Network Setup Wizard window, as shown in Figure 2. Click the Export button and start back up. Enter the PTZ Settings interface. Choose the camera for PTZ setting in the Camera dropdown list. Enter the parameters of the PTZ camera. Note: All the parameters should be exactly the same as the PTZ camera parameters. Example: If the PTZ came…. To use a USB mouse: 1. The mouse should automatically be detected. If in a rare case that the mouse is not detected, the possible reason may be that the two devices are not compatible, please refer to the recommended the device ….
Channel switch is supported. Note: In the instant playback mode, only record files recorded during the last five minutes on this channel will b…. You can call the pattern to make the PTZ movement according to the predefined path. Enter the PTZ Control interface. Choose pattern number in the option box. Figure 4. Click and use your mouse to drag the image or click the eight directional buttons in the control box under the ….
Click the OK button to save the settings and exit interface. Note: Only the admin user account has the permission of restoring factory default parameters. Enter the User Management interface. Select the user to be deleted from the list, as shown in Figure Click the i…. Choose the record file in Export interface and click button to check it. Steps 1. If not, please connect the device with the monitor and reboot.
Verify the connection cable is good. If there is still no image display on the monitor after rebooting, please check if the connection cable is good, and change a cable to connect again. Verify Input mode …. Table 6. Select the Group number for the current HDD. Note: The default group No. Click the OK button to confirm the settings. In the pop-up Attention box, click the Yes button to finish the settings. Before setting the HDD property, plea…. Click Next button after you configured the network parameters, which takes you to the HDD Management window, shown in Figure 2.
To initialize the HDD, click the Init button. Initialization removes all the data saved in the HDD. Note: At least one channel shall be selected. Select record files you want to back up. Click Export button to enter Export interface. Note: At least one record file shall be selected. He measured If a short circuit to ground occurs at the earphone jack, I guess an overload condition at the switching transistor.
Switch off the radio tone switch to music and hold your ear directly at the loud speker. Can you hear some low noise? If yes, change the damaged Q32 2SB In case of a damaged Q32 there will be no pop-up noise. Via PM, Bernhard told me that he had, among other things, changed the frequency response of the audio amp because originally it was too muffled. A circuit simulation via LTspice had shown the following -6dB points:. You can now download the result here.
All the rest is entirely discrete, with 13 transistors, 1 FET and a bunch of diodes. While having two ceramic FM IF filters and thus good FM selectivity for its day and class, for AM IF there is no more than a CFT class filter 1 ceramic element with two IFTs plus another tuned IFT to be found, making it the equivalent of a 6-circuit receiver in classic radio nomenclature middle of the road level basically and comparable to the later Grundig Yacht Boys or Philips D, but certainly quite good for its size back then.
For a complete restauration, I would suggest a workshop not afraid of working on old radios, or a vintage radio enthusiast if you aren't one yourself. Working with dial mechanics and the like in a very compact set isn't everyone's cup of tea and the speaker may be glued to the front in this one as well. What I would suggest to have done is:. Whether a basic set like this is worth all the effort is quite another matter, of course. If you want something to actually use on shortwave, I would rather invest some efforts into, say, a well-kept ICF-SW with the usual issues instead.
Gain distribution is an important topic in receivers, as it affects both obtainable sensitivity and dynamic range. If you have a noisy mixer without any preamplification and feed this with the modest signal levels of a telescopic antenna, the receiver won't be very sensitive. However, if you stuff a lot of gain into the RF preamp, the poor mixer may overload far too quickly. Some noise figure calculations are helpful in striking the right balance.
You need to know the antenna's noise figure, of course — a big antenna will always catch a lot more atmospheric noise than something as mismatched as a telescopic whip. The bandwidth of the various stages also plays a role, as it not only affects sum signal levels but also decides on which signals can still generate unwanted intermodulation products in following stages.
Proper gain distribution in battery operated receivers is not at all easy, as not only signal levels on the whip in particular may differ quite a bit between battery and mains operation, but also dropping battery voltage may lead to reduced gain.
Few receivers offer the flexibility needed to cope with such strongly varying input levels. Where AGC either as variable attenuation or direct gain control of an amplification stage is applied affects both quieting characteristics and strong-signal handling. In the kind of receivers we're looking at here, there is only one AGC loop whose control signal is derived from demodulator output or pre-detector 2nd IF level.
Now consider two scenarios:. While it is clear that frontend gain should not drop too early which would reduce SNR and thus lead to less steep quieting , no AGC in front of the first mixer in particular may mean that reception of stronger stations is still disturbed by intermodulation products, forcing the user to activate the attenuator. In the first scenario, only gain distribution and mixer signal handling capability will determine rx behavior.
The following table illustrating gain and AGC aspects of the various s was split for space reasons. The first part covers the various "digital" models. All of these use double balanced mixers, and for good reason — when using a wideband frontend, their 2nd order intermod rejection and generally better strong signal handling when compared to unbalanced mixers are really needed.
The second part covers analogs and unique models. These all use band filters and therefore have to make do with unbalanced first mixers. The analogs have a somewhat critical combination of high RF plus 1st mixer gain with a wideband 1st IF and less well-performing second mixer.
As explained in the ' section, the wideband 1st IF was deliberately chosen to improve frequency readout accuracy and stability. Only the 'DA uses a narrow crystal filter but still has high RF gain. Now the AOR isn't exactly a portable, so So, what about a little review? Handling: I got the folding twist right virtually on the first try after use, the antenna has to be folded together again, which had been reported as being a bit tricky until you get the hang of it , though it's quite possible that it would be more difficult with a stock antenna frame.
Operation is quite simple: Unfold antenna module and attach it somewhere that's a bit of an unsolved problem on this antenna, you can clip it somewhere and attach it to windows and such, but that's about it , connect antenna controller to both antenna and receiver if you were wondering what the somewhat strange-looking longish part is, that's a filter into which you plug in the cable from the antenna controller on one end and connect the thing to the antenna frame with the other end , put in two AA batteries into the antenna controller I used rechargeables, since I didn't have anything else at hand, and these work pretty well, with the switchoff voltage being roughly 2.
On others, it's necessary to explicitly turn the antenna controller on with the respective slider switch. While receiving, it's necessary to select the correct frequency range for best reception. Reception: That's what we bought this thing for, right? And so far, the AN-LP1 has not disappointed me. One must know, of course, that it's only good for the frequency range from about 80 meters to 13 meters, with a preference for the lower frequencies.
Also, the preselection helps a lot to minimise IM like on 80 and 22 meters, where at the time of testing the wire overloaded the receiver on the respective frequencies , and with the apparently rather sharp 5 MHz range, images from 49m on 60m a nuisance of the G are considerably attenuated.
Minimising interference by rotating the loop is also nice. All in all: Recommended. If you need better reception "on the go", the AN-LP1 makes a good travel companion. And not only that — it'll also deliver good performance at home and with the receiver used on a wall wart. I've retired the AN for now.