ACCEPTANCE TESTING
7-8 46882/439
Alternative attenuator functional test (not required for instruments with
Option 1)
(1) Connect the test equipment as shown in Fig. 7-1.
(2) Perform AUTO ZERO and AUTO CAL on the power meter.
(3) On the UUT set source A to:
[Carrier Freq] 10 [MHz]
[RF Level] 13 [dB]
(4) Use the knob to select ‘RF Board Shift-Reg 1’.
(5) Set a reference on the power meter such that 0 dB is indicated.
(6) On the UUT, use [Cursor Left] to move the cursor to the MSB and press [Toggle Bit].
(0
1111101).
This will enable the first 33 dB pad.
(7) Record the relative level measured on the power meter in Table 7-13. Note that this is a
nom
inal value since no software correction figures are applied to the attenuator when
performing this test.
(8) On the UUT, press [Toggle Bit] to disable the first 33 dB pad.
(9) Repeat (6) to (10) for the next four MSBs using [Cursor Right]; the 22 dB, 33 dB, 11 dB
and 33 dB pads respectively.
(10) Repeat (2) to (11) for source B and, if Option 1 is fitted, source C.
Combined RF output
Specification
Level range per tone:
−137 dBm to +4 dBm for carrier frequencies from 1 MHz to 1.2 GHz,
settable to +10 dBm.
Output power is uncalibrated above +4 dBm for frequencies above
1.2 GHz.
Accuracy:
For output levels above −127 dBm and over a temperature range of
17
°C to 27°C:
±1 dB to 1.2 GHz
±2 dB to 2.4 GHz.
Temperature coefficient <±0.02 dB/°C to 1.2 GHz and <±0.04 dB/
°C to
2.4 GHz.
Output impedance:
50 Ω
VSWR
<1.22:1 between 1 MHz and 1.2 GHz
<1.32:1 to 2.4 GHz.
Test equipment
Description Minimum specification Example
Power meter
±0.1 dB from 10 kHz to 2.4 GHz
IFR 6960B and
6912
RF level frequency response
Test procedure
(1) Perform AUTO ZERO and AUTO CAL on the power meter.
(2) Connect the test equipment as shown in Fig. 7-1 with the power sensor connected to the
combined RF output.
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General