Performance Tests 1
Keysight 53210A/53220A/53230A Assembly Level Service Guide 71
Test 6b: (Q) Frequency accuracy - channel 2/3, option 115
(15 GHz microwave channel)
This test verifies the frequency accuracy of Option 115 Channel 2 (53210A) or
Channel 3 (53220A/53230A) at three frequencies (300 MHz, 3.1 GHz, and 15.0
GHz).
Equipment
– FS725 Rubidium timebase
– Keysight E8257D-520 microwave signal generator
– Keysight 10503A BNC cable (2)
– Keysight 11500E (3.5) mm cable
– Keysight 1250-1250 N(M) to SMA(F)
E8257D-520 setup
– Output Frequency: 300 MHz
– Output Power: -23 dBm
The input power MUST be -23 ±0.5 dBm at the channel 3 input connector. If
necessary, use a 3.5 mm cable with certified loss at 300 MHz or a power meter
to verify input power.
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