Wavetek 21 Generator
Hersteller:
Modell:
21
Datum:
1983
Kategorie:
Gruppe:
Beschreibung:
11 MHz stabilized function generator

Information

Model 21 Mode! 21 is a closed-loop, frequency stabilized, function generator. Both short term and long term frequency accuracies are 0.09% over its 100 ^Hz to 11 MHz frequency range. Modes are continuous, triggered and gated. Output levels are to 20V peak-to-peak (10 Vp-p into 5052). Waveforms are sine, triangle, square, ramp up, ramp down, haversine, havertriangle and dc. Above 1,1 kHz waveforms are analog generated; below, waveforms are digitally synthesized. Synthesized waveforms can be held at any point and continued from that point. Synthesized output signal frequency is 1/1000 of reference clock frequency, which can be internal or external. By use of an external reference clock, the output range can be extended to ultra-low frequencies. An LCD display shows frequency (3Vz digits plus unit of measure) and annunciators that indicate selected operating modes, etc. Output is reverse power protected. 1.2 SPECIFICATIONS 1.2.1 Versatility Waveforms A bidirectional switch selects sine , triangle, square and dc. For frequencies below 1.100 kHz ramp up, ramp down and haver-waves are also available. Operational Modes Continuous: Generator runs continuously at selected frequency. Triggered: Generator is quiescent until triggered by external signal or manual trigger, then generates one complete waveform cycle at selected frequency. Gated: As triggered mode, except output continues for duration of gate signal. Last waveform started is completed. Frequency Range 100 piHz to 11 MHz in 9 overlapping decade ranges. Range switching with bidirectional switch with frequency digits; decimal and units displayed on LCD display. Each decade range capable of 1100:1 frequency change controlled by the Frequency Coarse and Fine controls. Function Output Waveform amplitude variable over a 20 dB range up to 20 Vp-p (10 Vp-p into 50Q) at Function Out. Waveform also present at Function Out (-20 dB) with a fixed 20 dB attenuation relative to the Function Out for a full 40 dB of amplitude range. Peak output current is 100 mA maximum at Function Out. Source impedance of both outputs is 50Q. DC Offset and DC Output Waveform offset and dc output variable with DC Offset control with off position for calibrated zero offset. Function Out is ± 10V maximum (± 5V into 50Q) as offset or Vdc output. Signal peak plus offset limited to ± 10V(±5V into 50S2). DC offset plus waveform attenuated proportionately at Function Out (-20 dB). Sync Output TIL pulse (50 % duty cycle) at Generator frequency wifi drive 10 LS TTL loads. VCG — Voltage Controlled Generator Up to 1100:1 frequency change with external 0 to ± 5V signal applied to VCG IN connector. Upper and lower frequencies limited to maximum and minimum of selected range. Input impedance is 5kΩ and maximum slew rate is 0.1 V/µs. VCG IN is disconnected when the Stabilizer is engaged. Trigger and Gate External TTL compatible signal at Trig In BNC triggers or gates Generator output when Generator is in trigger or gate mode. Generator triggers on positive edge of input or gates on for duration of high level input. External signal pulse width is 50 ns minimum with a maximum repetition rate of 5MHz. Stabilizer When selected, the Generator frequency is stabilized at the displayed frequency to a crystal-controlled reference. The Stabilizer improves long term frequency stability for all durations to be equal to the 10 min. short term value. When the stabilizer is on, the Generator frequency is corrected to the displayed frequency ±0.09% of rangeover the entire operating temperature range of 0 to 4- 50°C. The stabilizer is automatically turned off when the mode is taken out of continuous or Ext Ref. is enabled. Dispiay 1100 count LCD frequency display with frequency ranging units(mHz, Hz, kHz, and MHz)and decimal point. Annunciators indicate selection of waveform, stabilizer and external reference status, haverwave selection and Generator mode. External Reference External Reference switch provides selection of internal or external control of waveform output frequency and also provides a means of holding or releasing the waveform manually, electrically or through external contact closure. External Reference connector accepts either aTTL compatible signal (1.1 MHz maximum repetition rate, 200 ns minimum pulse width) or contact closure. External reference provides four modes of operation. Int Ref: Normal waveform function Generator operation when in internal reference and the Ext Ref BNC is either left unconnected or connected to + 5 Vdc or aTTL high. Ext Ref: External Reference operation by applying frequency to the Ref In BNC with external reference selected. Frequency input controls frequency of the selected waveform at the output. The output frequency will be 1/1000 the reference frequency. Maximum output frequency is 1.100 kHz. When external reference is selected, the display is disabled and blanked. Manual Hold: At any point on the output waveform by use of the Ref button. Reference mode must be “Int Ref” as above. When Ref button is pressed, the output is stopped. When pressed again, the waveform will start again exactly where it stopped. Electrical Hold: At any point on the output waveform: When in “Int Ref” operation and 1.100 kHz or below, hold the waveform by applying 0 Vdc or a TTL low to the Ext Ref BNC or through remote contact closure shorting out the BNC. When in “Ext Ref” operation, hold the waveform by removing the external signals at Ext Ref BNC or bringing it to 0 Vdc.

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Service- und Bedienungsanleitung
Dokumenttyp:
Service- und Bedienungsanleitung
Seiten:
51
Größe:
2.76 Mbytes (2898320 Bytes)
Sprache:
english
Revision:
Dokument-ID:
Datum:
01 Januar 1985
Qualität:
Gescanntes Dokument, teilweise schwer oder teilweise nicht zu lesen.
Upload Datum:
13 August 2018
MD5:
0e005a5cb486e3d1deaea001df1504f8
Downloads:
192

Information

Instruction Manual

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Bedienungsanleitung
Dokumenttyp:
Bedienungsanleitung
Seiten:
24
Größe:
1.17 Mbytes (1231821 Bytes)
Sprache:
english
Revision:
Revised
Dokument-ID:
Datum:
Qualität:
Gescanntes Dokument, alles ist lesbar.
Upload Datum:
06 November 2011
MD5:
228098f3f648fe8e9174e55afb5c0a3c
Downloads:
498

Information

Simplified Operator's Manual

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