Operating basics
Rear panel connectors
Table 2: Rear panel connectors
Item
Connector
Description
1
AC power (input)
Connect the unit to a power source through the power cord provided with the instrument.
The center pin is connected to the chassis so that the entire box is earth grounded. The
unit will operate with an AC input from 100 to 240 V
AC
, and with a frequency of 50/60
Hz. The instrument requires 85 W and implements power factor correction. Connect
only to a properly grounded outlet.
2
SYMBOL CLOCK
(output)
This BNC provides a square wave synchronized to the symbol clock used in the
modulation. The rising edge of this clock triggers the programmed event markers
associated with the arbitrary waveform.
3
EVENT (outputs)
Three BNC outputs labeled #1, #2, and #3 are available for synchronizing external
instrumentation to programmable events within a generated arbitrary waveform. These
may be programmed, for instance, to mark the start of a frame, or a slot within a frame,
or the start of a synchronizing pattern in the waveform. One of the event markers may be
further programmed to control the RF power of the front panel output for the generation
of TDMA signals. Events are triggered on the rising edge of the symbol clock.
4
VECTOR MOD IN I
VECTOR MOD IN Q
These BNC inputs enable external I/Q modulation. They accept signals of ±0.5 V,
corresponding to full scale modulation, and have 50
Ω
input impedances. Both inputs
support signal bandwidths from DC to 100 MHz providing an RF modulation bandwidth
of up to 200 MHz.
5
VECTOR MOD OUT I
VECTOR MOD OUT Q
These BNC outputs replicate the baseband I/Q modulation waveforms currently being
used to modulate the RF. Both outputs have a source impedance of 50
Ω
and when
terminated into 50
Ω
, will generate a full scale output of ±0.5 V.
6
ANALOG MOD OUT
This output replicates the analog modulation waveform and has a 50
Ω
reverse
termination. When using the internal source for AM, FM, and
Φ
M, it provides a waveform
determined by the function and rate settings with an amplitude of 1 V
PP
into a high
impedance. During external analog modulation, this output mirrors the modulation
input. For Pulse modulation, the output is a 3.3 V logic waveform that coincides with
the gate signal.
TSG4100A Series RF Signal Generators User Manual
13
