Check the listing for details. Agilent/RACAL 6103E Ref. Frequence Module with MTI 251-1536-A OCXO. Condition: Used. Listed at 99.00 USD. Pull out from a Agilent/Racal 6103E GSM Tester with MTI High Stability OCXO. Two reference frequency output. of 10.000000 MHz/9 dB and 13.000000 MHz/0 dB.