ACCEPTANCE TESTING
6-B-2
Pulse modulation
The following tests are for a 2050T, 2051T or 2052T with the pulse modulation option fitted.
Specification
Maximum input level:
Minimum ON Level:
Maximum OFF level:
+5 V.
+3.5 V.
+1.0 V.
OFF/ON ratio :
Greater than 70 dB at the carrier frequency.
Typically greater than 80 dB.
Additional output
level error:
Less than 0.5 dB.
Test equipment
Description Minimum
specification Example
Power meter
±0.1 dB from 30 kHz to 2.7 GHz.
IFR 6960B
and 6912 sensor
Spectrum analyzer
Frequencies up to 1.4 GHz. Capable of
measuring <-70 dBm.
IFR 2386
Function generator
DC capability. HP3325B
Test procedures
C3195
RF OUTPUT
OUTPUT
6912
Power
Sensor
➤
➤
➤
UUT
Function Generator
6960B
RF Power Meter
SENSOR
INPUT
PULSE
INPUT
Fig. 6-B-1 Levels test set-up
Minimum 'ON' level
(1)
Connect the test equipment as shown in Fig. 6-B-1.
(2)
Set the UUT to
[RF Level]
0 dBm
[Carrier Freq.]
10 MHz and
[Pulse Mod.].
(3)
Set the function generator to give +3.5 V DC. The 0 dBm level should now appear on the
power meter.
Maximum 'OFF' level
(4) Set the function generator to give 1.0 V DC. The 0 dBm level should now disappear from the
power meter.
Additional level error
(1) Set the UUT to [Carrier Freq.] 1 MHz, [RF level] 0 dBm.
(2) Measure and record the RF level indicated on the power meter (P1).
(3) Set the UUT to
[Pulse Mod.]
(4) Set the function generator to give +5 V DC.
(5) Measure and record the RF level indicated on the power meter (P2).
(6) The difference between P1 and P2 must be less than 0.5 dBm.