en:nrd-535
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | |||
en:nrd-535 [2021/12/27 09:57] – mb | en:nrd-535 [2021/12/27 13:26] (aktuell) – mb | ||
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The arrangement of the controls on the **front panel** has been slightly changed. The three-position mains switch with a position for activating the timer mode has been moved to the left, the volume control and the tone control are on the right below the number keys. The numeric keys for direct frequency entry are still located on the front of the unit in an upright position; after longer operation with frequent frequency entries, one risks the typical NRD wrist cramp (the numeric keys of the Drake R-8 are located further down, here only the character of the wrist pain changes...). The six buttons above the main tuning knob change the function of the big UP/DOWN buttons. Depending on the setting, which is marked by a small LED, these buttons change the frequency, bandwidth, AGC response speed, tuning step width and speed, call up the memories or activate ECSS operation. | The arrangement of the controls on the **front panel** has been slightly changed. The three-position mains switch with a position for activating the timer mode has been moved to the left, the volume control and the tone control are on the right below the number keys. The numeric keys for direct frequency entry are still located on the front of the unit in an upright position; after longer operation with frequent frequency entries, one risks the typical NRD wrist cramp (the numeric keys of the Drake R-8 are located further down, here only the character of the wrist pain changes...). The six buttons above the main tuning knob change the function of the big UP/DOWN buttons. Depending on the setting, which is marked by a small LED, these buttons change the frequency, bandwidth, AGC response speed, tuning step width and speed, call up the memories or activate ECSS operation. | ||
- | Six easy-to-grip rotary controls to the left of the large main tuning knob, which is also pleasantly smooth on this receiver, are used to set the RF gain, the [[notch|notch filter]] to suppress an unwanted interference signal, the squelch, the [[PBT|passband tuning]], the adjustable bandwidth (BWC) and the activity of the noise suppressor. JRC has reacted to the fact that incorrect operation of these controls by newcomers to shortwave reception sometimes made reception impossible, so the activation of each function is indicated in the display | + | Six easy-to-grip rotary controls to the left of the large main tuning knob, which is also pleasantly smooth on this receiver, are used to set the RF gain, the [[notch|notch filter]] to suppress an unwanted interference signal, the squelch, the [[PBT|passband tuning]], the adjustable bandwidth (BWC) and the noise limiter. JRC has reacted to the fact that incorrect operation of these controls by newcomers to shortwave reception sometimes made reception impossible, so the activation of each function is indicated in the display with a small red indicator |
- | The rear panel is similar to that of the NRD-525, only the missing VHF/UHF antenna connectors and the model designation NRD-535 indicate which receiver you are sitting behind. The antenna input can be switched from a high-impedance long-wire antenna to a coax input. | + | The rear panel is similar to that of the [[NRD-525]], only the missing VHF/UHF antenna connectors and the model designation NRD-535 indicate which receiver you are sitting behind. The antenna input can be switched from a high-impedance long-wire antenna to a coax input. |
- | The RS-232 computer interface is fitted as standard on the NRD-535, and the RTTY decoder board familiar from its predecessor can also be plugged into this receiver | + | An RS-232 computer interface is fitted as standard on the NRD-535, and the same RTTY decoder board as found on the predecessor can also be plugged into the NRD-535 |
- | In practical use, the NRD-535 is characterised by its high input sensitivity in the short-wave range and large-signal | + | In practical use, the NRD-535 is characterised by its high sensitivity in the short-wave range and rugged |
- | The NRD-535 is equally suitable for broadcast DX, especially with weak signals and signals affected by interference, as well as excellent for receiving CW or radio teletype signals for the utility dxer. Quickly after its release, | + | The possibilities to eliminate interfering |
- | After I had soldered a suitable serial PC cable, my PC made contact with the NRD-535 without any problems when the pin assignment of the cable was finally correct. With the well-documented control sequences in the manual, the receiver can be addressed | + | The NRD-535 is equally suitable for broadcast DX, especially when listening to weak signals and signals affected by interference, |
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+ | After I had soldered a suitable serial PC cable, my PC made contact with the NRD-535 without any problems when the pin assignment of the cable was finally correct. With the well-documented control sequences in the manual, the receiver can be addressed | ||
===== Technical principle ===== | ===== Technical principle ===== | ||
- | The HF signal first passes through a 35 MHz low-pass filter and the switchable 20 dB attenuator, then the electronically | + | The HF signal first passes through a 35 MHz low-pass filter and the switchable 20 dB attenuator, then the electronically |
==== Components ==== | ==== Components ==== |
en/nrd-535.1640595451.txt.gz · Zuletzt geändert: 2021/12/27 09:57 von mb