Chapter 1
PORTRAYAL
What’s in This
Chapter
This chapter contains general and functional description of the
Model 9260 dual/differential wideband power amplifier. It also
describes the front and rear panel connectors and its operational
modes. It also and provides description of all features available with
the instrument.
Introduction
The Model 9260, as shown in Figure 1-1, is a bench-top, 2U, half
19” rack size, fully metal case dual channel amplifier. The
instrument can be configured to be used as two, single-ended and
independent channels, or as a one input with two differential
outputs.
The inputs to the amplifiers be configured to match different source
impedances such as 50
, 75
, or 1 M
. The output is driven
from a 0
source.
There are three inputs for each channel:
1. Main input. This input is located on the front panel and is
normally used for signal inputs.
2. Auxiliary input. This input is located on the rear panel and can
be used as a summing input.
3. DC Offset input. This input is also located on the rear panel and
can be used for offsetting the signal level within the specified
output level window.
The outputs are located on the front panel. There are two outputs,
one for each channel. When the 9260 is configured as two
separate amplifiers, the outputs generate amplified signals within
the range of 34 Vp-p.
Note
The output of the 9260 tends to oscillate if left open. The same may
occur if the signal is applied to a high impedance source.
The bandwidth of the amplifier is around 30 MHz for large signals.
Small signal bandwidth can reach 45 MHz.
The 9260 can be configured as a differential amplifier. In this case,
the channel 2 input is disabled and channel 1 input is amplified and
