Geräte Informationen:

Wavetek 907 Generator
Hersteller:
Wavetek
Modell: 907
Datum: 1983
Kategorie: Messgeräte
Gruppe: Generator
Beschreibung: 7 to 11GHz Signal Generator
Informationen:
                                    MODEL 907

The model 907 Signal Generator is a lightweight, compact
source of RF signals. The 7 to 11 GHz frequency range is
continuously variable with front panel or external voltage
control; frequency is displayed on a 31/2 digit LCD. Output
level is continuously adjustable from 0 to -127 dBm by front
panel or external voltage control; a 3Vz digit LCD displays
the level. Modes of operation include CW, AM, FM and Pulse
with internal or external modulation and trigger signals. In
addition to the main RF output, there is a constant level
auxiliary output. Two sync outputs and two monitor outputs
allow timing and monitoring of modulation and triggering
functions.

1.2	SPECIFICATIONS

1.2.1	Versatility

The Mode! 907 Signal Generator is a signal source with AM,
FM, pulse modulation and external sweep capabilities. All
parameters are Independently adjustable.

Pulse and FM modulation signals may be externally provided
or selected from the Internal modulation Generator.

Frequency and output level may also be externally (remotely)
controllable. External 0 to -I- 5V ramp with repetition
rates to 15 Hz will sweep the entire RF frequency range.

Internal modulator signals are available for monitoring and
system synchronization.

Modes

CW: Continuous RF output. Frequency and level adjustable.

FM: Internal or external signals can frequency modulate the
RF output. Rate and deviation are adjustable.

Pulse: internal or external signals can pulse modulate the
RF output. Pulse width adjustable or fixed 50% duty cycle;
rate and delay adjustable. External pulse mode can trigger
the pulse circuits on rising or falling edge of input
signal. A gate mode allows the external input to control
pulse width.
1.2.2	Output

NOTE

Output specifications applicable to nonswept operation only.

Frequency

Varied by a 10-turn potentiometer and a ± 4 MHz vernier or
by an external 0 to + 5V.

Range: 7.0 to 11.0 GHz.

Readout: 3 1/2 digit LCD, 10 MHz resolution.

Accuracy: ±1%of reading.

Stability: 60 ppm/°C; less than 20 ppm (± 10% line variation).

Signal Purity

(Internal frequency control, CW).

Residual FM: <15 kHz peak.

Harmonics: < -30 dBc

Spurious: < ~ 55 dBc

Level

Varied by a 10-turn potentiometer or external 0 to + 13.6V
(-10 dB/V). Output can be switched on and off.

Range (Leveled): 0 to -127 dBm; 0.225V to 0.100pN (into 50Ω).

Maximum Output: > + 3 dBm unleveled.

Readout: 3 1/" digit LCD, calibrated in dBref, dBm and Vrms.

Resolution: 0.1 dB.

Amplitude Accuracy:

Accuracy	Output Level

±1dB	0 dBm

±2 dB	0 to — 60 dBm

±3dB	-60 to -127 dBm

Below -127 dBm power decreases monotonically, but is
uncalibrated. Output level is continuously adjustable.

Impedance: 50Ω.

VSWR: <1.5

Connector: Female type N coax.

Auxiliary Output Power: > - 5 dBm CW signal. Reverse power
protection: + 30 dBm average.

1.2.3	Pulse Modulation

Transition Times: <35 ns for leading and trailing edges;
typically 12 ns/25 ns, respectively.

On-Off Ratio: > 80 dB when main output is set at 0 dBm.

Width: 200 ns to 100 (is in 2 ranges: for greater widths,
use external gated mode.

Delay Range: 3 to 1 ms in 2 ranges, relative to normal sync.
(Not applicable to gate mode.)

Internal Mode: Fixed square wave or variable width pulses;
10 Hz to 10 kHz in 3 ranges.

External Pulse Mode: Triggers internally generated pulse
delay and width from PULSE TRIG Input.

PULSE TRIG Input: 1 Vp-p minimum trigger; slope and trigger
point adjustable; ±10V maximum.

External Gate Mode: RF output occurs for the duration that
PULSE TRIG INPUT signal exceeds trigger level setting.

1.2.4	FM ■ Frequency Modulation

Maximum RF Output Deviation: >5 MHz p-p.

Internal Sawtooth Modulator: 10 Hz to 10 kHz in 3 ranges.

External FM Input: >1 MHz/V; ± 2.5V max level; 0 to >10 kHz;
10 kΩ input impedance.

1.2.5	AM • Amplitude Modulation

Ext. Modulation Frequency Range: 0 to 10 kHz.
Maximum Source Level: ± 2V peak.

Input Impedance: 10 kΩ.

Sensitivity: 27 dB/V (nominal).

1.2.6	Modulator Outputs

FM: Signal from external or internal modulation Generator.
6000 source impedance.

Pulse: Positive TTL level pulse occurring at selected
repetition rate, pulse delay and pulse width of modulator pulse.

Normal Sync: Positive TTL level pulse occurring at selected
repetition rate.

Delayed Sync: Positive TTL level pulse synchronous with
modulator pulse with selected delay.

Folgende Anleitungen sind hier verfügbar:

Dokumenttyp: Service- und Bedienungsanleitung Wavetek-11138-Manual-Page-1-Picture
Seitenanzahl: 89
Dateigröße: 3.17 Mbytes (3328847 Bytes)
Sprache: Englisch
Revision: K
Dokument-ID/Nummer:
Datum: 01 Januar 1983
Qualität: Gescanntes Dokument, alles ist lesbar.
Upload Datum:
MD5: d16d3de5c5575e7201f14d6bed1a1730
Downloads: 131 seit dem 15 August 2018
Informationen:
SECTION 1 GENERAL DESCRIPTION

1.1	MODEL 907
 ... 1>1

1.2
SPECIFICATIONS ... 1-1

1.2.1
Versatility ... 1-1

1.2.2
Output ... 1-1

1.2.3	Puise Modulation ... 
 ... 1-2

1.2.4	FM — Frequency
Modulation ... 1-2

1.2.5	AM — Amplitude
Modulation ... 1
*2

1.2.6	Modulator
Outputs ... 1-2

1.2.7	General
 ... 1-2

SECTION 2 INITIAL PREPARATION AND INSTALLATION

2.1	MECHANICAL
INSTALLATION ... 2-1

2.2	ELECTRICAL
INSTALLATION ... 2-1

2.2.1	Power
Connection ... 2-1

2.2.2	Signal
Connections ... 2-1

2.3	INITIAL CHECKOUT
PROCEDURE ... 2-1

SECTION 3 OPERATION

3.1	CONTROLS AND
CONNECTORS ... 3-1

3.2
OPERATION ... 3-3

3.2.1	CW Operation  ... 
 ... 3-4

3.2.2	FM
Operation ... • ... 3-4

3.2.3	Pulse
Operation ... 3-5

3.2.4	External Output Level and Frequency
Control ... 3-5

SECTION 4 CIRCUIT DESCRIPTION

4.1	INTRODUCTION ... 
 ... 4-1

4.2	GENERAL OPERATION
 ... 4-1

4.3	YIG-GUNN
OSCILLATOR ... 4-2

4.3.1
Introduction ... 4-2

4.3.2	Gunn Diode and Gunn
Bias ... 4-2

4.3.3	YIG Sphere and
Coil ... 4-2

4.3.3.1	Internal Frequency
Control ... 4-3

4.3.3.2	External Frequency Control
 ... 4-3

4.3.4	FM Coil
Driver ... 4-3

4.3.4.1	FM Deviation Control ... 
 ... 4-3

4.3.4.2	Modulation
Generator ... 4-3

4.3.5
Heater ... 4-4

4.4	ISOLATOR
 ... 4-4

4.5	LEVELERLOOP
 ... 4-4

4.5.1
Leveler ... 4-4

4.5.2	Leveler
Loop ... 4-5

4.5.3
Detector ... 4-5

4.5.4	Level
Corrector ... 4-5
4.6	ATTENUATOR
CIRCUITS ... 4-6

4.6.1	Attenuator ... 
 ... 4-6

4.6.2	Attenuator Driver ... 
 ... 4-6

4.6.3	Attenuator
Control ... 4-6

4.6.4	Attenuator
Corrector ... 4-7

4.7	RF SWITCH ...   ... 
 ... 4-9

4.7.1	Switch
Driver ... 4-9

4.7.2	Internal Square Wave
 ... 4-10

4.7.3	Internal
Pulse ... 4-10

4.7.3.1	Delay
One-Shot ... 4-10

4.7.3.2	Width
One-Shot ... 4-10

4.7.3.3	Sync One-Shot  ... 4-10

4.7.4	External Pulse( +
)and(—') ... 4-10

4.7.5	External
Gate ... 4-11

4.8	DISPLAY ... 
 ... 4-11

4.8.1	Frequency
Display ... 4-12

4.8.2	Output Level
Display ... 4-12

4.9	POWER SUPPLY ... 
 ... 4-12

SECTION 5 TROUBLESHOOTING

5.1	FACTORY
REPAIR ... 5-1

5.2	PROBLEM
ISOLATION ... 5-1

5.3	CABLES AND
CONNECTORS ... 5-1

SECTION a CALIBRATION

6.1	FACTORY REPAIR
 ... 6-1

6.2	CALIBRATION
 ... 6-1

6.3	EXTENSION
CABLE ... 6-1

SECTION 7 PARTS AND SCHEMATICS

7.1
DRAWINGS ... 7-1

7.2
ADDENDA ... 7-1

7.3	ORDERING
PARTS ... 7-1

Wavetek-11138-Manual-Page-1-Picture


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