HP 8642A Operation And Calibration Manual page 22

General Information
Model 8642A/B
Table 1-2. Supplemental Characteristics (2 of 2)
Supplemental characteristics are typical. but non-warranted performance parameters, intended to be useful in instru-
ment applications.
INTERNAL REFERENCE OSCILLATOR
Characteristic
Standard
Aging rate ±2 ppmfyear
Temperature ±4 ppm. 0° to 55°C
Line voltage ±0.1 ppm.
+5%. -10%
Output, rear panel:
Frequency: 10 MHz.
1-14
Level: >1.4 Vp-p into 50 ohms.
Impedance: 75 ohms.
High Stability
(opt. 001)
See Table 1-1
±7
x
10-
9 ,
00 to 55°C
±3
x
10-
9 ,
+5%, -10%
EXTERNAL REFERENCE
Input, rear panel:
Frequency: 1, 2, 5, or 10 MHz, ±25 ppm.
Level: >0.5 Vp-p.
Impedance: 500 ohms.