This document contains information proprietary to
Wavetek and is provided solely for instrument
operation and maintenance. The information in this
document may not be duplicated in any manner
without the prior approval in writing from Wavetek.
Wavetek-Datron
Test and Measurement Division
Hurricane Way
Norwich
Norfolk NR6 6JB, U.K.
Tel: 44 1603 256600
Fax: 44 1603 256688
Table of Contents
Specifications 2
Safety 10
Installation 11
General 12
Circuit Descriptions 13
Calibration 18
Parts List 21
Component Layouts 29
Circuit Diagrams 31
1
Note: This specification covers the whole series which includes 2- and 4- channel instruments;
the interchannel specifications only apply to the multi-channel instruments.
Specifications apply at 18−28ºC after 30 minutes warm−up, at maximum output into 50Ω
Harmonic Distortion: <0.1% THD to 100kHz; <–65dBc to 20kHz
<–50dBc to 1MHz,
Non−harmonic Spurii:
Square
Range: 1mHz to 16MHz
Resolution: 1mHz (4 digits)
Accuracy: ± 1 digit of setting
Output Level:
Rise and Fall Times: <25ns
Triangle
Range: 0.1mHz to 100kHz
Resolution: 0.1mHz or 7 digits
2.5mV to 10Vp−p into 50Ω
<−35dBc to 10MHz
<−30dBc to 16MHz
<–65dBc to 1MHz, <–65dBc + 6dB/octave 1MHz to 16MHz
2.5mV to 10Vp−p into 50Ω
Accuracy: 10 ppm for 1 year
Output Level:
Linearity Error: <0.1% to 30 kHz
Ramps and Sin(x)/x
Range: 0.1mHz to 100kHz
Resolution: 0.1mHz (7 digits)
Accuracy: 10 ppm for 1 year
Output Level:
Linearity Error: <0.1% to 30 kHz
2
2.5mV to 10Vp−p into 50Ω
2.5mV to 10Vp−p into 50Ω
Pulse and Pulse Train
Output Level: 2.5mV to 10Vp−p into 50Ω
Rise and Fall Times: <25ns
Period:
Range: 100ns to 100s
Resolution: 4-digit
Accuracy: ±1 digit of setting
Delay:
Range: −99.99s to +99.99s
Resolution: 0.002% of period or 25ns, whichever is greater
Width:
Range: 25ns to 99.99s
Resolution: 0.002% of period or 25ns, whichever is greater
Note that the pulse width and absolute value of the delay may not exceed the pulse period at any
time.
Pulse trains of up to 10 pulses may be specified, each pulse having independently defined width,
delay and level. The baseline voltage is separately defined and the sequence repetition rate is set
by the pulse train period.
Arbitrary
Up to 100 user defined waveforms may be stored in the 256K point non−volatile RAM.
Waveforms can be defined by front panel editing controls or by downloading of waveform data via
RS232 or GPIB.
Waveform Memory Size: 64k points per channel. Maximum waveform size is 64k
Vertical Resolution: 12 bits
Sample Clock Range: 100mHz to 40MHz
Resolution: 4 digits
Accuracy: ± 1 digit of setting
Sequence
Up to 16 waveforms may be linked. Each waveform can have a loop count of up to 32,768.
A sequence of waveforms can be looped up to 1,048,575 times or run continuously.
Output Filter
Selectable between 16MHz Elliptic, 10MHz Elliptic, 10MHz Bessel or none.
points, minimum waveform size is 4 points
3
OPERATING MODES
Triggered Burst
Each active edge of the trigger signal will produce one burst of the waveform.
Carrier Waveforms: All standard and arbitrary
Maximum Carrier Frequency: The smaller of 1MHz or the maximum for the selected
Number of Cycles: 1 to 1,048,575
Trigger Repetition Rate: 0.005Hz to 100kHz internal
Trigger Signal Source: Internal from keyboard, previous channel, next channel or
External from TRIG IN or remote interface.
waveform.
40Msamples/s for ARB and Sequence.
dc to 1MHz external.
trigger generator.
Gated
Sweep
Trigger Start/Stop Phase:
Waveform will run while the Gate signal is true and stop while false.
Carrier Waveforms: All standard and arbitrary.
Maximum Carrier Frequency: The smaller of 1MHz or the maximum for the selected
Trigger Repetition Rate: 0.005Hz to 100kHz internal
Gate Signal Source:Internal from keyboard, previous channel, next channel or
Gate Start/Stop Phase:
Frequency sweep capability is provided for both standard and arbitrary waveforms. Arbitrary
waveforms are expanded or condensed to exactly 4096 points and DDS techniques are used to
perform the sweep.
Carrier Waveforms: All standard and arbitrary except pulse, pulse train and sequence.
± 360° settable with 0.1° resolution, subject to waveform
frequency and type.
waveform.
dc to 1MHz external.
trigger generator.
External from TRIG IN or remote interface.
± 360° settable with 0.1° resolution, subject to waveform
frequency and type.
40Msamples/s for ARB and Sequence.
4
Sweep Mode: Linear or logarithmic, triggered or continuous.
Sweep Direction: Up, down, up/down or down/up.
Sweep Range: From 1mHz to 16 MHz in one range. Phase continuous.
Independent setting of the start and stop frequency.
Sweep Time: 30ms to 999s (3 digit resolution).
Marker: Variable during sweep.
Sweep Trigger Source: The sweep may be free run or triggered from the following
sources: Manually from keyboard. Externally from TRIG IN input or
remote interface.
Sweep Hold: Sweep can be held and restarted by the HOLD key.
Multi channel sweep: Any number of channels may be swept simultaneously but the
sweep parameters will be the same for all channels. Amplitude,
Offset and Waveform can be set independently for each channel.
Tone Switching
Capability provided for both standard and arbitrary waveforms. Arbitrary waveforms are expanded
or condensed to exactly 4096 points and DDS techniques are used to allow instantaneous
frequency switching.
Carrier Waveforms: All waveforms except pulse, pulse train and sequence.
Frequency List: Up to 16 frequencies from 1mHz to 10MHz.
Trigger Repetition Rate: 0.005Hz to 100kHz internal
Source: Internal from keyboard, previous channel, next channel or trigger
Tone Switching Modes:
Gated:
The tone is output while the trigger signal is true and stopped, at the
dc to 1MHz external.
Usable repetition rate and waveform frequency depend on the tone
switching mode.
generator.
External from TRIG IN or remote interface.
end of the current waveform cycle, while the trigger signal is false.
The next tone is output when the trigger signal is true again.
Triggered:
The tone is output when the trigger signal goes true and the next
tone is output, at the end of the current waveform cycle, when the
trigger signal goes true again.
FSK: The tone is output when the trigger signal goes true and the next
tone is output, immediately, when the trigger signal goes true again.
Using 2 channels with their outputs summed together it is possible to generate DTMF test
signals.
Trigger Generator
Internal source 0.005 Hz to 100kHz square wave adjustable in 10us steps. 3 digit resolution.
Available for external use from any SYNC OUT socket.
OUTPUTS
Main Output - One for each channel
Output Impedance:
Amplitude:
50Ω
5mV to 20Vp−p open circuit (2.5mV to 10Vp−p into 50Ω). Amplitude
can be specified open circuit (hi Z) or into an assumed load of 50Ω or
600Ω in Vpk−pk, Vrms or dBm.
Amplitude Accuracy:
Amplitude Flatness: ±0.2dB to 200 kHz; ±1dB to 10 MHz; ±2.5dB to 16 MHz.
DC Offset Range:
DC Offset Accuracy: Typically 3% ±10mV, unattenuated.
Resolution: 3 digits or 1mV for both Amplitude and DC Offset.
2% ±1mV at 1kHz into 50Ω.
±10V.DC offset plus signal peak limited to ±10V from 50Ω.
5
Sync Out - One for each channel
Multifunction output user definable or automatically selected to be any of the following:
Waveform Sync:
(all waveforms) A square wave with 50% duty cycle at the main waveform frequency, or
a pulse coincident with the first few points of an arbitrary waveform.
Position Markers:
(Arbitrary only) Any point(s) on the waveform may have associated marker bit(s) set
high or low.
Burst Done: Produces a pulse coincident with the last cycle of a burst.
Sequence Sync: Produces a pulse coincident with the end of a waveform sequence.
Trigger: Selects the current trigger signal. Useful for synchronizing burst or
gated signals.
Sweep Sync: Outputs a pulse at the start of sweep to synchronize an oscilloscope or
recorder.
Phase Lock Out: Used to phase lock two generators. Produces a positive edge at the 0°
phase point.
Output Signal Level:
Cursor/Marker Out
Adjustable output pulse for use as a marker in sweep mode or as a cursor in arbitrary waveform
editing mode. Can be used to modulate the Z−axis of an oscilloscope or be displayed on a
second ‘scope channel.
Output Signal Level: Adjustable from nominally 2V to 14V, normal or inverted; adjustable
Output Impedance:
INPUTS
Trig In
Frequency Range:
Signal Range: Threshold nominally TTL level; maximum input ±10V.
Minimum Pulse Width: 50ns, for Trigger and Gate modes; 50us for Sweep mode.
Polarity: Selectable as high/rising edge or low/falling edge.
Input Impedance:
Modulation In
TTL/CMOS logic levels from typically 50Ω.
width as a cursor.
600Ω typical
DC − 1MHz.
10kΩ
Sum In
6
Frequency Range: DC – 100kHz.
Signal Range:
SCM: Approximately ± 1Vpk for maximum output.
Input Impedance:
Frequency Range:
Signal Range:
Input Impedance:
VCA: Approximately 1V pk−pk for 100% level change at maximum
output.
Typically 1 kΩ.
DC − 8 MHz.
Approximately 2 Vpk−pk input for 20Vpk−pk output.
Typically 1kΩ.
Hold
Holds an arbitrary waveform at its current position. A TTL low level or switch closure causes the
waveform to stop at the current position and wait until a TTL high level or switch opening which
allows the waveform to continue. The front panel MAN HOLD key or remote command may also
be used to control the Hold function. While held the front panel MAN TRIG key or remote
command may be used to return the waveform to the start. The Hold input may be enabled
independently for each channel.
Input Impedance:
10kΩ
Ref Clock In/Out
Set to Input: Input for an external 10MHz reference clock. TTL/CMOS threshold
level.
Set to Output: Buffered version of the internal 10MHz clock. Output levels nominally
1V and 4V from 50Ω.
Set to Phase Lock: Used together with SYNC OUT on a master and TRIG IN on a slave to
synchronise (phase lock) two separate generators.
INTER-CHANNEL OPERATION
Inter-channel Modulation:
The waveform from any channel may be used to Amplitude Modulate (AM) or Suppressed Carrier
Modulate (SCM) the next channel. Alternatively any number of channels may be Modulated (AM
or SCM) with the signal at the MODULATION input socket.
Carrier frequency: Entire range for selected waveform.
Carrier waveforms: All standard and arbitrary waveforms.
Modulation Types:
AM: Double sideband with carrier.
SCM: Double sideband suppressed carrier.
Modulation source: Internal from the previous channel.
External from Modulation input socket.
The external modulation signal may be applied to any number of
channels simultaneously.
Frequency Range: DC to >100 kHz.
Internal AM:
Depth: 0% to 105%
Resolution: 1%.
Carrier Suppression
(SCM):
External Modulation
Signal Range:
SCM: Approximately ± 1Vpk for maximum output.
> −40dB.
VCA: Approximately 1V pk−pk for 100% level change at maximum
output.
7
Inter-channel Analog Summing:
Waveform Summing sums the waveform from any channel into the next channel.
Alternatively any number of channels may be summed with the signal at the SUM input socket.
Carrier frequency: Entire range for selected waveform.
Carrier waveforms: All standard and arbitrary waveforms.
Sum source: Internal from the previous channel.
External from SUM IN socket.
Frequency Range: DC to >8MHz.
External Signal Range:
Inter-channel Phase locking:
Two or more channels may be phase locked together. Each locked channel may be assigned a
phase angle relative to the other locked channels. Arbitrary waveforms and waveform sequences
may be phase locked but certain constraints apply to waveform lengths and clock frequency
ratios. With one channel assigned as the Master and other channels as Slaves a frequency
change on the master will be repeated on each slave thus allowing multi−phase waveforms at the
same frequency to be easily generated.
DDS waveforms are those with 7 digits of frequency setting resolution, while Non−DDS
waveforms have 4 digits
Phase Resolution:
DDS waveforms: 0.1 degree
Non−DDS waveforms:
Phase Error:
All waveforms: <±10ns
The signals from the REF IN/OUT socket and the SYNC OUT socket can be used to phase lock
two instruments where more than 4 channels are required.
Inter-channel Triggering:
Approximately 5Vpk−pk input for 20Vpk−pk output.
0.1 degree or 360 degrees/number of points whichever is the greater.
Any channel can be triggered by the previous or next channel.
The previous/next connections can be used to ’daisy chain’ a trigger signal from a ‘start’ channel,
through a number of channels in the ‘chain’ to an ‘end’ channel. Each channel receives the trigger
out signal from the previous (or next) channel, and drives its selected trigger out to the next (or
previous) channel. The ‘end’ channel trigger out can be set up to drive the ‘start’ channel, closing
the loop.
In this way, complex and versatile inter−channel trigger schemes may be set up. Each channel
can have its trigger out and its output waveform set up independently. Trigger out may be
selected from Waveform End, Position Markers, Sequence Sync or Burst Done.
Using the scheme above it is possible to create a sequence of up to 64 waveform segments,
each channel producing up to 16 segments and all channels being summed to produce the
complete waveform at the output of channel 4.
INTERFACES
Full remote control facilities are available through the RS232 or GPIB interfaces.
Data Entry: Keyboard selection of mode, waveform etc.; value entry direct by
numeric keys or by rotary control.
Stored Settings:
Size: 3U (130mm) height; 350mm width (2 and 4 channels),
Weight: 7.2 kg. (16 lb), 2 and 4 channels; 4.1kg (9lb) 1 channel.
Power: 230V, 115V or 100V nominal 50/60Hz, adjustable internally;
Operating Range:
Storage Range:
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.
Options: 19 inch rack mounting kit.
Safety:
EMC:
Up to 9 complete instrument set−ups may be stored and recalled
from battery−backed memory. Up to 100 arbitrary waveforms can
also be stored independent of the instrument settings.
212mm (½−rack) single channel; 335mm long.
operating range ±14% of nominal; 100VA max. for 4 channels,
75VA max. for 2 channel, 40VA max. for 1 channel. Installation
Category II.
+5°C to 40°C, 20−80% RH.
−20°C to + 60°C.
Complies with EN61010−1.
Complies with EN50081−1 and EN50082−1.
9
Safety
This generator is a Safety Class I instrument according to IEC classification and has been
designed to meet the requirements of EN61010−1 (Safety Requirements for Electrical Equipment
for Measurement, Control and Laboratory Use). It is an Installation Category II instrument
intended for operation from a normal single phase supply.
This instrument has been tested in accordance with EN61010−1 and has been supplied in a safe
condition. This instruction manual contains some information and warnings which have to be
followed by the user to ensure safe operation and to retain the instrument in a safe condition.
This instrument has been designed for indoor use in a Pollution Degree 2 environment in the
temperature range 5°C to 40°C, 20% − 80% RH (non−condensing). It may occasionally be
subjected to temperatures between +5° and −10°C without degradation of its safety. Do not
operate while condensation is present.
Use of this instrument in a manner not specified by these instructions may impair the safety
protection provided. Do not operate the instrument outside its rated supply voltages or
environmental range.
WARNING! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited. The protective action must not be
negated by the use of an extension cord without a protective conductor.
When the instrument is connected to its supply, terminals may be live and opening the covers or
removal of parts (except those to which access can be gained by hand) is likely to expose live
parts. The apparatus shall be disconnected from all voltage sources before it is opened for any
adjustment, replacement, maintenance or repair.
Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided
as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of
the hazard involved.
If the instrument is clearly defective, has been subject to mechanical damage, excessive moisture
or chemical corrosion the safety protection may be impaired and the apparatus should be
withdrawn from use and returned for checking and repair.
Make sure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short−circuiting of fuse holders is prohibited.
This instrument uses a Lithium button cell for non−volatile memory battery back−up; typical life is
5 years. In the event of replacement becoming necessary, replace only with a cell of the correct
type, i.e. 3V Li/Mn0
in accordance with local regulations; do not cut open, incinerate, expose to temperatures above
60°C or attempt to recharge.
Do not wet the instrument when cleaning it and in particular use only a soft dry cloth to clean the
LCD window. The following symbols are used on the instrument and in this manual:−
20mm button cell type 2032. Exhausted cells must be disposed of carefully
2
Caution−refer to the accompanying documentation,
incorrect operation may damage the instrument.
10
l
terminal connected to chassis ground.
mains supply OFF.
mains supply ON.
alternating current.
Mains Operating Voltage
Check that the instrument operating voltage marked on the rear panel is suitable for the local
supply. Should it be necessary to change the operating voltage, proceed as follows:
1) Disconnect the instrument from all voltage sources.
2) Remove the screws which retain the top cover and lift off the cover.
3) Change the transformer connections following the diagram below.
4) Refit the cover and the secure with the same screws.
5) To comply with safety standard requirements the operating voltage marked on the rear panel
must be changed to clearly show the new voltage setting.
6) Change the fuse to one of the correct rating, see below.
Installation
Fuse
Ensure that the correct mains fuse is fitted for the set operating voltage. The correct mains fuse
types are:
To replace the fuse, disconnect the mains lead from the inlet socket and withdraw the fuse drawer
below the socket pins. Change the fuse and replace the drawer.
The use of makeshift fuses or the short−circuiting of the fuse holder is prohibited.
Mains Lead
When a three core mains lead with bare ends is provided it should be connected as follows:−
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited. The protective action must not be
negated by the use of an extension cord without a protective conductor.
Mounting
This instrument is suitable both for bench use and rack mounting. It is delivered with feet for
bench mounting. The front feet include a tilt mechanism for optimal panel angle.
for 230V operation connect the live (brown) wire to pin 15
for 115V operation connect the live (brown) wire to pin 14
for 100V operation connect the live (brown) wire to pin 13
for 230V operation: 250 mA (T) 250V HRC
for 100V or 115V operation: 500 mA (T) 250V HRC
Brown
Blue
Green / Yellow
WARNING! THIS INSTRUMENT MUST BE EARTHED
Mains Live
−
Mains Neutral
−
Mains Earth
−
A rack kit for mounting in a 19” rack is available from the Manufacturers or their overseas agents.
11
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