Tabor Electronics 5251, User Manual

Page: 293 / 298

A
Appendices
Specifications
A-3
Frequency/Time Accuracy
Internal 10 MHz Reference

0.0001% (1 ppm TCXO) initial tolerance from
19

C to 29

C; 1ppm/

C below 19

C and above
29

C; 1 ppm/year aging rate
External 10 MHz Reference
Connector Front panel SMB
Frequency 10 MHz
Impedance and Level 10 k
Ω

5%, TTL, 50%

2% duty cycle, or 50
Ω

5%,
0 dBm, manually selectable using internal jumpers
External Sample Clock
Connector Front panel SMB
Frequency From dc to 250 MHz
Impedance and Level 50
Ω

5%, PECL
Function Generator Characteristics
Description One may select from a list of a built-in library of
standard waveforms. The waveforms are computed
every time a waveform is selected. The integrity of
the waveform and its upper frequency limit depend
on the programmed frequency value and the number
of waveform points that are used for computing one
cycle interval
Frequency Range
Sine, Square
1 mHz to 100 MHz
All other waveforms 1 mHz to 16 MHz
Frequency Resolution 11 digits
Accuracy & Stability Same as frequency reference
Sine
Start Phase Range 0-360.0

Start Phase Resolution 0.01

Sine Wave Performance
THD 0.15% to 100 kHz, STD and CW
Harmonics and Spurious at less than 3 Vp-p 28dBc, <100 MHz
35dBc, <50 MHz
48dBc, <10 MHz
55dBc, <1 MHz
Harmonics and Spurious at less than 5 Vp-p 25dBc, <100 MHz
30dBc, <50 MHz
43dBc, <10 MHz
45dBc, <1 MHz
Harmonics & Spurious at less than 10 Vp-p 22dBc, <100 MHz
25dBc, <50 MHz
35dBc, <10 MHz
37dBc, <1 MHz
Flatness at less than 5 Vp-p
5% to 10 MHz
10% to 100 MHz
Triangle
Start Phase Range 0-360.0
