Keysight 85650A Quasi Peak Adapter

Discontinued

The 85650A quasi-peak adapter is an accessory used with the 8566B or 8568B spectrum analyzers for performing quasi-peak measurements as recommended by CISPR. These include the correct 6 dB bandwidths (200 Hz, 9 kHz, 120 kHz) and the specified detector charge and discharge time constants.

Product Info

Frequency Band (MHz)	Bandwidth at 6 dB	Charge TC (ms)	Discharge TC (ms)
0.01–0.15	200 Hz	45	500
0.15–30	9 kHz	1	160
30–1000	120 kHz	1	550

Quasi-peak Response to CISPR Pulse (dBμV)

PRF (Hz)	10 to 150 kHz	0.15 to 30 MHz	30 to 1000 MHz
1000	—	64.5 ± 2.5	68.0 ± 2.5
100	64.0 ± 2.5	60.0 ± 1.5	60.0 ± 1.5
60	63.0 ± 2.5	—	—
25	60.0 ± 1.5	—	—
20	—	53.5 ± 2.5	51.0 ± 2.5
10	56.~± 2.5	50.0 ± 3.0	46.0 ± 3.0
5	52.5 ± 3.0	—	—
2	47.0 ± 3.5	39.5 ± 3.5	34.0 ± 3.5
1	43.0 ± 3.5	37.5 ± 3.5	31.5 ± 3.5
Isolated Pulse	41.0 ± 3.5	36.5 ± 3.5	28.5 ± 35