Datasheet

Technical Specifications (continued)
Gated
Waveform will run while the Gate signal is true and stop while false.
Carrier Waveforms: Sine, Square, Ramp, PRBS, Arb, Pulse, Noise
Max. Carrier Freq.: 10 MHz, subject to carrier waveform
Trigger Rep. Rate: 2mHz to 1MHz internal, dc to 1MHz external.
Gate Signal Source: Internal from keyboard or trigger generator.
External from TRIG IN or remote interface.
Start/Stop Phase: -360.0 to +360.0 degrees, 0.1 degree resolution, subject to carrier
waveform.
Sweep
Frequency sweep capability is provided for both standard and arbitrary waveforms.
Carrier Waveforms: All standard, PRBS and arbitrary except pulse.
Sweep Mode: Linear or logarithmic, triggered or continuous.
Sweep Direction: Up, down, up/down or down/up.
Sweep Range: From 1µHz to 50MHz, (1µHz to 25MHz) subject to carrier waveform.
Phase continuous. Independent setting of the start and stop frequency.
Sweep Time: 1ms to 500s (6 digit resolution).
Marker: Variable during sweep.
Trigger Source: The sweep may be free run or triggered from the following sources:
Internal from keyboard or trigger generator.
Externally from TRIG IN input or remote interface.
Trigger Generator
Internal source 2mHz to 1MHz square wave adjustable in 1µs steps, 9 digit resolution.
Also available for external use from the SYNC OUT socket.
OUTPUTS
Main Output
Output Impedance: 50 W
Amplitude: 20mV to 20Vp-p open circuit (10mV to 10Vp-p into 50 W). Amplitude
can be specified open circuit (Hi Z) or into an assumed load of 50W or a
specified impedance between 1 W and 10k W in Vpk-pk, Vrms or dBm.
Amplitude Accuracy: 2% ±1mV at 1kHz into 50 W.
DC Offset Range: ±10V. DC offset plus signal peak limited to ±10V from 50 W.
DC Offset Accuracy: Typically 3% ±10mV.
Resolution: 3 digits or 1mV for both Amplitude and DC Offset.
Sync Out
Multifunction output user definable or automatically selected to be any of the following:
Carrier Waveform Sync: The function varies with waveform type as follows:
Sine/Ramp/Pulse - A square wave with 50% duty cycle at the waveform frequency.
Square - A square wave with same duty cycle as the main output at the waveform frequency.
Arbs - A square wave with 50% duty cycle at the waveform frequency. The sync is a TTL high when
the first point of the waveform is output. Noise - No sync associated with noise.
Modulation Sync: The function varies with modulation type as follows:
AM/FM/PM/PWM - A square wave with 50% duty cycle referenced to the internal modulation
waveform when modulation source is internal, or a square wave referenced to the carrier waveform
when modulation source is external. No sync is associated with noise as the modulation source.
FSK - A square wave referenced to the trigger rate. The sync is a TTL high when hop frequency is
the output frequency and TTL low when carrier frequency is the output frequency for positive slope
and vice versa for negative slope.
Burst Sync: A square wave that is a TTL high when the burst begins and a TTL low
when burst is completed.
Trigger: Selects the current trigger signal. Useful for synchronizing burst or
gated signals.
Sweep Sync: The function varies with marker selection as follows:
Marker Off - A square wave that is a TTL low from the midpoint of the sweep and a TTL high from
the end of the sweep.
Marker On - A square wave that is a TTL low from the marker frequency and a TTL high from the
end of the sweep.
Output Signal Level: Logic level nominally 3V.
Ref Clock Output
Buffered version of the 10MHz clock currently in use (internal or external)
Output Level: Nominally 3V logic level from 50 W.
INPUTS
Trig In
Frequency Range: DC - 1MHz.
Signal Range: Threshold nominally TTL level; maximum input ±10V.
Minimum Pulse Width: 50ns
Polarity: Selectable as high/rising edge or low/falling edge.
Input Impedance: 10k W
External Modulation Input (for AM, FM, PM, PWM)
Voltage Range: ± 5V full scale
Input Impedance: 5k W typical
Bandwidth: DC to 20kHz
Ref Clock Input
Input for an external 10MHz reference clock
Voltage Range: 1Vpp – 5Vpp
Maximum Voltage: +5V
Minimum Voltage: -1V
TWO CHANNEL OPERATION (TG5012A & TG2512A only)
The two channels can be operated independently so as to act as entirely separate generators.
Alternatively the channels can interact as follows:
Coupled Operation
Coupled Frequency: Frequencies can be coupled such that if frequency of one channel is
changed the frequency of the other channel also changes either by a
fixed ratio or fixed offset. A pulse waveforms can only be frequency
coupled to another pulse waveform, however sine, square, ramp or Arb
waveforms can be coupled to any other waveform of that group.
Coupled Level: -Amplitudes (and DC offsets) of the two channels can be coupled such
that changing the amplitude and offset on one channel changes the
amplitude and offset of both channels.
Coupled On/Off: Coupling can be set such that switching the output on/off on one
channel switches the output on/off of both channels.
Tracking Operation
When in tracking mode both channels behave as one channel. If inverse tracking is selected,
both channel still behave as one channel except that the output of channel 2 is inverted.
Relative Phase
Pressing the ‘align’ key phase synchronises the two channels with the specified phase offset.
Phase Range: -360.0 to +360.0 degrees
Resolution: 0.1 degree
Skew (typical): <1ns
Cross Channel Trigger
Either channel can be triggered by the other channel to set up a complex and versatile inter
channel trigger scheme.
Each channel can have its trigger output waveform set up independently. Trigger Out may
be selected to be carrier waveform referenced, modulation waveform referenced, sweep
referenced, burst referenced or the currently selected trigger of the channel.
Crosstalk
Channel Crosstalk: Typically better than 80dB
Control and Display
The control of each channel is selected by the Channel Select key.
The display can be assigned either completely to the selected channel, or the upper section
can display the main set-up parameters or waveforms for both channels simultaneously.
PHASE SYNC (Phase Synchronising Two Generators)
Two generators can be synchronised together to provide outputs at the same frequency (or
harmonics) and with a phase difference.
The amplitude and phase of these outputs can also be modulated providing the capability to
perform QAM and QPSK respectively.
In case of 2 channel generators when phase synchronising is performed the two channels of
each generator are also synchronised providing four synchronous waveforms.
It is also possible to synchronise more than two generators but the precision is not
guaranteed.
Carrier Waveforms: Sine, Square, Ramp, Pulse, Arb
Phase Range: -360.0 to +360.0 degrees
Resolution: 0.1 degree
Accuracy: < ±5ns
BUS INTERFACES
Full digital remote control facilities are available through LAN and USB and optional GPIB
interfaces.
LAN Interface: Ethernet 100/10base – T hardware connection.
LXI Compliance: LXI V1.2, Class C compliant.
USB Interface: Standard USB 2.0 hardware connection.
Implemented as virtual-COM port.
GPIB Interface: Conforming with IEEE-488.1 and IEEE-488.2 (option G only)
USB Flash Drive: Front mounted socket for waveform and setup storage/recall.
Driver Software Supplied
IVI Driver: An IVI driver for Windows is supplied. This provides support for
common applications such as LabView*, LabWindows*, HPVEE* etc.
LV/CVI Driver: Full installation for CVI and LabVIEW instrument drivers.
USB Driver: An installation file is supplied calling a standard Windows* USB driver.
* LabView and LabWindows are trademarks of National Instruments.
HPVEE (now Agilent VEE) is a trademark of Agilent Technologies.
* USB interface is supported for Windows 2000 and above (inc. 64-bit versions)
Windows is a trademark of Microsoft.