Kirisun DM588 - DM588 Radio Maintenance and Test Devices; Standard Signal Generator Specifications; Power Meter Specifications; Frequency Deviation Meter Specifications

DM588 Service Manual
Item Environment
Measurement Tool and Method
Index Requirement
Test Device Test Point Tool Method
16. Analogue RX
distortion
1) Set the tester to RX
state;
2) Set RF Gen Freq to a
medium frequency, set
Amplitude: -47dBm, AF
Gen 1 Freq: 1kHz, FM
W:3kHz (wide band)/N:
1.5kHz (narrow band),
Filter: 300Hz-3kHz, and
adjust audio power to
about 0.5W;
3) Set the tester to
distortion meter.
Connect
antenna
interface of the
radio to RF
IN/OUT
interface of the
tester, and
EXT-SPK+
interface of the
radio to AUDIO
IN interface of
the tester.
* Observe the Distn value of the tester. < 5%
17. Analogue RX
SNR
1) Set the tester to RX
state;
2) Set RF Gen Freq to a
medium frequency, set
Amplitude: -47dBm, AF
Gen 1 Freq: 1kHz, FM W:
3kHz (wide band)/N:
1.5kHz (narrow band),
Filter: 300Hz-3kHz, and
adjust audio power to
about 0.5W;
3) Set the tester to
distortion meter.
Connect
antenna
interface of the
radio to RF
IN/OUT
interface of the
tester, and
EXT-SPK+
interface of the
radio to AUDIO
IN interface of
the tester.
* Observe the SNR value of the tester.
W: > 40dB;
(medium frequency)
(not tested);
N: > 35dB
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