Controls And Connectors; General Operating Information; Signal Connection; Count Mode - Tektronix 7D11 Instruction Manual

CONTROLS AND CONNECTORS

The major controls and connectors for operation of the
7011 are located on the front panel of the unit. Two
controls located inside the unit for auxiliary functions are
described in the General Operating Information section.
The front-panel controls and connectors are identified in
Fig. 1·2; their functions are as follows:
Q)
COUNT MODE Switch
Selects
source for Time count mode.
CD
B SWEEP DELAY MODE Switch
Selects the delay mode logic for time-base unit in
B Horizontal compartment of mainframe.
CD
TRIGGER SLOPE/LEVEL Controls
Select slope and amplitude point of input signal
where the delay is initiated.
CD
TRIG'O Indicator
Li � hts when a trigger is produced.
CD
COUPLING Switch
Selects the method of coupling the input signal
to the Trigger circuit.
o
SOURCE Switch
Selects Trigger input signal source.
EVENTS
Controls
Select slope and amplitude point of input signal
where the Events Start count is initiated.
DELAY TIME OR EVENTS Control
Selects delay time or number of events counted.
Direction of rotation selects increase or decrease
in delay time or number of events.
o
FINE DELAY (ns) Dial
Selects analog delay time added to digital delay
time selected by DElAY TIME OR EVENTS
control.
, .
�
'-
mode of operation and
START TRIGGER SLOPE/LEVEL
®
DLY'DTRIG OUT
BNC
signal.
®
EXT 1 MHz IN or EVENTS START TRIG IN
BNC connector for input of external 1 MHz
time'reference signal or input of Events Start
Trigger input signal. Connector function is deter'
mined by setting of COUNT MODE switch.
clock-signal
®
DLY INTERVAL OUT
BNC connector for Delay Interval output signal.
®
EXTTRIG IN
BNC connector for external input to Trigger
circUit (selected by SOURCE switch
external positions).
RESET
Resets the DELAY TIME OR EVENTS to
0000001 (EFF SN 8030000 and up).

GENERAL OPERATING INFORMATION

Signal Connection

In general, pmbes offer the most convenient means of
connecting signals to tha 7011 external trigger inputs.
TEKTRONIX
electrostatic interference. A 10X attenuation probe offers a
high input impedance and allows the circuit under test to
perform very close to normal operating conditions. Also, a
10X probe attenuates the input signal ten times.
TEKTRONIX probes are designed to monitor the signal
source with minimum circuit loading. The use of a probe
will, however, limit the maximum trigger frequency range.
To obtain maximum trigger bandwidth when using probes,
select a
capacitance; observe the grounding considerations given in
the probe manual. The probe·to·connector adapters and the
bayonet'ground tip provide the best frequency response.
In high·frequency applications, requiring maximum over­
all bandwidth, use a coaxial cable terminated at both ends
in the characteristic impedance of the cable. To maintain
the high·frequency characteristics of the applied signal, use
high'quality low·loss cable. Resistive coaxial attenuators
can be used to minimize reflection if the applied signal has
suitable amplitude.
REV. JAN 1974
Operating Instructions-7D1l Operators
connector for Delayed
probes are shielded to prevent pickup of
probe capable of compensating
Trigger output
in the
the input
1-3