ACCEPTANCE TESTING
6-C-4
(4) Set the UUT to
[RF Level]
-6.1 dBm and measure the RF level.
(5) Decrement the output of the UUT in 6 dB steps down to an RF level of -120.1 dBm
measuring the RF level at each step. Check that the measured level is within specification.
(6) Repeat (2) to (5) at the frequencies given in Table 6-C-2.
(7) Set the local oscillator to +8 dBm at the frequencies indicated in brackets in Table 6-C-2.
Table 6-C-2 Attenuator frequency settings
Frequency (MHz)
2050T/1T *2051T
2.5 1725
(1662)
31 2700
(2637)
325
1125
*At frequencies above 1300 MHz the down converter will automatically be enabled.
The frequency of the local oscillator will have to be entered on the receiver followed by the test
frequency. This will automatically set the receiver to the required IF frequency.
Alternative attenuator functional check
(1) Connect the test equipment as shown in Fig. 6-C-1.
(2) Set the UUT to
[Carrier Freq.]
1.35 GHz
[RF Level]
10 dBm.
(3) Set a reference on the power meter.
(4) Using the latch poke facility on the UUT, select each attenuator pad individually as follows:
[UTIL]
[Utils. Menu 2] [Latch Data]
95 [enter]
[Decimal/Binary]
The binary latch data will now appear in the bottom right-hand side of the display.
(5) By using the
[Toggle Bit]
and the
[Cursor Left]
[Cursor Right]
soft keys, select each
attenuator pad in turn which should give the nominal readings on the power meter in the
following sequence:
-60 dB -30 dB -12 dB -30 dB -24 dB -30 dB
Note that no software correction is applied to the attenuator when performing this test. Therefore
errors in the nominal values are not necessarily reflected in the RF level accuracy.