RELM Communications Inc SRU50ABC ユーザーズマニュアル

S Series Repeater USER MANUAL

©RELM Communications Inc.  Revision 1.0

Thermal controlled fan.

RF Rise Time:

4mS with continuous VCO selected
(Controlled RF envelope).

Sensitivity:

Better than -117dBm for 12dB  ( 25 KHz spacing ), C-
weighted, De-emphasis. Typical -120dBm

Selectivity 66-520MHz (Option):

More than 80 dB for 25 KHz adj channel, more than 70 dB for
12.5 KHz adj channel, for switching BW 10MHz minimum.

Selectivity 66-520MHz:

More than 75 dB for 25 KHz adj channel, more than 65 dB for
12.5 KHz adj channel, for switching BW same as band
allocation.

Selectivity 805-960MHz:

More than 70 dB for 25 KHz adj channel more than 65 dB for
12.5 KHz adj channel for switching BW same as band
allocation.

Spurious Resp:

Better than 90dB.

Intermodulation:

Better than 80dB.

Blocking:

Better than 100dB at +/- 1MHz point.

Distortion:

Less than 2%.

S/N Ratio:

Better than 50dB C-weighted, wide band. Better than 44dB C-
weighted, narrow band .

RF Switching Bandwidth:

10MHz minimum or equal to band allocation.

Receiver Front End BW:

Equal to band allocation, no retuning.

Audio Bandwidth:

DC to 3400Hz (-0.5dB)

Squelch Opening Time:

20mS.

Squelch Closing Time:

100mS.

Conducted Spurious:

Less than -57dBm, typ -90dBm.

Tx Timer:

2 minutes, on/off selectable.

VF Level to Line:

+6 to -15dBm, 600 ohms unbalanced or differential.

VF Level from Line:

+6 to -15dBm, 600 ohms unbalanced

Pre-Emphasis Accuracy:

Within +/-0.5dB of 6dB per octave curve.

De-Emphasis Accuracy:

Within +/-0.5dB of 6dB per octave curve.

VF Compressor Range:

>30dB for line input,

Control Outputs:

1K ohm 5V source/sink available.

Alarm Output:

Open collector.

PTT Input:

Logic or Opto-isolated +/- 5 to 48V.

Channel Select:

8 way Dip switch or RS232 or BCD

Repeater Tail Timer:

2 seconds nominal.