Test of Specification R&S M3SR Series 4100 HF Transceivers
3.9 6124.9007.82.01
5 Squelch Function
5.1 Set transceiver to 29.1 MHz with +J3E
modulation (Default: BW 2,4 kHz, PreAmp
On). Select RSSI squelch ON. Choose RSSI
level 50 dBr.
Apply HF input signal of 29.101 MHz,
-103.5 dBm to X30.
By using the audio analyzer, check the AF
signal between X26.11/.41.
< -40 dBm (AF audio output is muted)
By using the digital multimeter, check SQL
signal on X26.9 (open drain).
low impedance to GND
5.2 Rise HF input signal to -80 dBm at X30.
Check the AF signal between X26.11/.41. > -40 dBm (AF audio output is present)
Check state of LED SQL. LED SQL is illuminated.
Check SQL signal on X26.9 (open drain). high impedance to GND
6 Audio Interface / B8E Receive
6.1 Set transceiver to mode B8E receive state
10.7 MHz, PreAmp On, AGC On.
Apply 2 HF signals via 2 signal generators
(SG1, SG2) and combiner to X2111 (RX
only), with:
SG1 (USB): 10.701 MHz
SG2 (LSB): 10.699250 MHz
Both signals shall have an HF level of
-80 dBm after combiner.
Turn HEADSET knob to maximal volume.
By using the audio analyzer, check the AF
signal between contacts A and B of HEAD-
SET connector (X7).
Frequency: 1 kHz
AF level: 4.0 V
RMS
(+3/-2 dB) at 300
Ω
Distortion: < 5 %
No. Activity Nominal Value
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