PathAlign-R
Spectracom Corporation
2200 / 2240 / 2241 PathAlign-R Manual
3-30
3.6
Maintenance
Warning! There are no user serviceable parts inside the PathAlign-R. Refer oscillator
calibration to a qualified technician. Refer all other calibration, and all repairs, to the
factory.
3.6.1 Cleaning
Accumulated dirt on the exterior of the instrument or on the Weather-resistant Instrument Back-
pack may be removed with a soft cloth or a small soft brush dampened with a mild detergent
and water solution. Abrasive cleanser should never be used.
3.6.2 Troubleshooting and / or Performance Verification
The Incoming Confidence / Verification Check procedure may be used for troubleshooting /
performance verification, as a confidence check for incoming inspection, and to verify the need
for recalibration, maintenance or repair.
3.6.3 Maintenance Schedule
The 2240 does not require any regular maintenance except for the recommended annual
calibration of the internal oscillator.
3.7
Oscillator Calibration Procedure
Spectracom recommends that the 2240’s internal reference oscillator (TCXO) be calibrated
annually to a traceable Reference Frequency Standard (such as NIST) in order to maintain the
PathAlign-R’s guaranteed specifications.
Using a fully charged battery, turn the PathAlign-R power ON and allow the instrument to warm
up for 30 minutes.
Using a 20 GHz (or better) CW microwave frequency counter, connect the traceable Reference
Frequency Standard to the ‘External Reference IN’ BNC jack on the Frequency Counter.
On the front panel of PathAlign-R, set the thumbwheel switches to read 19.000 GHz, and the
‘MASTER/SLAVE’ toggle switch to ‘MASTER’.
Using a nonconductive tuning tool, adjust the ‘Osc. Calib.” Trimmer, R28, on the PathAlign-R’s
rear panel until the frequency counter reads 19.020,000,000 GHz, ±10 kHz.
