Anritsu MT8820A - VSWR Value for Main Input;Output Connector

9.1 Performance Test
9-7
(5) Temperature stability test
Note:
Use a thermostat with no oscillation to perform this test.
[Procedure]
1. In the connection diagram, Fig. 9-1-4-1, install MT8820A in the thermo-
stat and set its temperature at 25°C
2. Turn MT8820A On and wait until internal temperature, become stable (it
takes about 1.5 hours after internal temperature of the thermostat become
stable).
3. After internal temperature is stable, measure the output frequency from 10
MHz Buff Out connector of MT8820A using the frequency counter. The
value is read to the 0.1 Hz digit (hereafter, read the value in the same man-
ner).
4. Set the internal temperature of the thermostat to 50°C.
5. After the internal temperatures of the thermostat and MT8820A are stable,
measure the output frequency from 10 MHz Buff Out connector of
MT8820A.
6. Calculate the stability with the following formula.
Frequency stability = (Frequency counter value at 50°C) − (Frequency counter value at 25°C)
(Frequency counter value at 25°C)
7. Set the internal temperature of the thermostat to 0°C.
8. After the internal temperatures of the thermostat and MT8820A are stable,
measure the output frequency from 10 MHz Buff Out connector of
MT8820A.
9. Calculate the stability with the following formula.
(Frequency counter value at 0°C) − (Frequency counter value at 25°C)
Frequency stability =
(Frequency counter value at 25°C)
9.1.5 VSWR value for Main input/output connector
The test on VSWR value for Main input/output connector is explained here.
(1) Test object specifications
Table 9-1-5-1 Specification of VSWR value for
Main input/output connector
Item Specification
VSWR
≤1.2 (Frequency ≤ 1.6 GHz)
≤1.25 (1.6 GHz ≤ frequency ≤ 2.2 GHz)
≤1.3 (Frequency > 2.2 GHz)