Configuration; Warranty Information; Manual Addenda; Safety Symbols And Terms - Keithley 776 Instruction Manual

General Information
fication. If this prefix differs from that listed on the title
page of this manual, there are differences between this
manual and your instrument.
1-3. Configuration
There are two configurations available for the Model 776:
• Model 776 - Two-channel 225 MHz programmable
counter/timer.
• Model 776/2.4G - Same as above with 2.4 GHz Chan-
nel C and TCXO time base.
• Model 776/2.4G/R - Same as above with rear panel
inputs.

1-4. Warranty Information

Warranty information is located on the inside front cover
of this instructions manual. Should your Model 776
require warranty service, contact the Keithley representa-
tive or authorized repair facility in your area for further
information. When returning the instrument for repair, be
sure to fill out and include the service form at the back of
this manual to provide the repair facility with the neces-
sary information.

1-5. Manual Addenda

Any improvements or changes concerning the instrument
or manual will be explained in an addendum included with
the manual. Be sure to note these changes and incorporate
them into this manual.
Table 1-1. Model 776 Specifications
INPUT CHARACTERISTICS
(Channel A & B)
RANGE
DC coupled
AC coupled 1 M Ω
50 Ω
SENSITIVITY (X1)
0 to 200 MHz
200 MHz to 225 MHz
5 ns Minimum Pulse Width
SIGNAL OPERATING RANGE
(X1)
(X10)
DYNAMIC RANGE (x1)
0 to 100 MHz
100 MHz to 225 MHz
Page 1-2

1-6. Safety Symbols And Terms

The following symbols and terms may be found on an
instrument or used in this manual.
!
The symbol on an instrument indicates that the user
should refer to the operating instructions located in the
manual.
The WARNING heading used in this manual explains
dangers that might result in personal injury or death.
Always read the associated information very carefully
before performing the indicated procedure.
The CAUTION heading used in this manual explains
hazards that could damage the instrument. Such damage
may invalidate the warranty.

1-7. Inspection

The Model 776 was carefully inspected, both electrically
and mechanically before shipment. After unpacking all
items from the shipping carton, check for any obvious
signs of physical damage that may have occurred during
transit. (Note: There may be a protective film over the
display lens, which can be removed.) Report any damage
to the shipping agent immediately. Save the original
packing carton for possible future re-shipment. The
following items are included with every Model 776 order:
: 0 to 225 MHz.
: 30 Hz to 225 MHz.
: 1 MHz to 225 MHz.
: 50 mV rms sine wave.
: 75 mV rms sine wave.
: 75 mVp-p.
: -5.00 Vdc to +5.00 Vdc.
: -50.0 Vdc to +50.0 Vdc.
: 75 mV to 5 Vp-p.
: 150 mV to 2.5 Vp-p.