The recommended replacement is Agilent''s 86207A RF Bridge, 75 Ohm, 300 kHz to 3 GHz
The Agilent 8721A is used in return-loss measurements made with a swept source such as a tracking generator and spectrum analyzer. This 50 ohm bridge (75 ohm optional) has a 6 dB insertion loss and 6 dB coupled to the auxiliary arm.
Features:
Directivity: Greater than 40 dB, (1 to 110 MHz)
Load-Port Return Loss: Greater than 30 dB
Maximum Input Power: +20 dBm
Frequency response: Plus/Minus 0.5 dB
List of Options
008
75 ohm impedance
1BN
Military Standard 45662A Calibration Certification
1BP
Military Standard 45662A Calibration with Test Data