Functions Related To Talker Capability; Listener Capability: L4; Service Request Capability: Sri - HP 4262A Operating And Service Manual

Model 4262A
Section III
Paragraphs 3-68 to 3-70
(4) LCR Data
(5) Data Delimiter
(6) Loss
D.Dissipation Factor measurement
Q.Quality Factor measurement
(7) DQ Data
(8) Data Terminator
3-68. Functions Related to Talker Capability.
EOI (End Or Identify): When multiple byte data
of Source Handshake has been sent, the
4262A provides EOI to the bus.
Talk Only Mode: When ADDRESS switch is set
to TALK ONLY "1" position, the 4262A
is set to Talker regardless of address code.
Talk Address Disabled by Listen Address:
MTA (My Talk Address) is automatically
disabled when MLA (My Listen Address) is
set. MTA (My Talk Address) is otherwise
disabled by IFC (Interface Clear) signal,
OTA (Other Talk Address) signal or UTA
(Untalk Address) signal.
SDC (Selected Device Clear): When this
command is accepted, front panel con¬
trols are set to initial conditions (the
same conditions that are automatically
set after turn-on of power switch).
Listen status is automatically disabled when MTA
(My Talk Address) is received. Listen status is
otherwise disabled by IFC (Interface Clear) signal
or ULA (Unlisten Address) signal.
3-70. Service Request Capability: SRI.
The 4262A sends an SRQ (Service Request) signal
whenever it is set in one of the six possible RQS
(Request Status) states. It does this by responding
to a serial poll of the controller by setting an STB
(Staus Byte) signal on the bus. The 7th bit of this
8 bit signal establishes whether or not a service
request exists. The remainder of the 8-bit signal
identifies the character of the SRQ.
NOT USED
be b? be
bs
b4 b3
□
PASS
FAIL 3
SRQ YES/NO
SYN ERR
SRQ (Service Request) is disabled when RQS
(Request Status) or STB (Status Byte) is set to
00000000 or when STB (Status Byte) signal
transfer is completed.
3-69. Listener Capability: L4.
Request Statuses (RQS) of the 4262A:
To receive Remote Program signal or Addressed
Command signal, the 4262A is set to Listener by
an MLA (My Listen Address) signal from the bus.
(1) Remote Program signal: Remote program
codes for the 4262A are listed in Table
3-60.
(2) Addressed Command signal: When the
4262A receives command signals GET,
GTL, or SDC, it is set to Listener and con¬
trolled by command signals. These
command signals are valid regardless of the
status (remote or local).
GET (Group Execute Trigger): When the
4262A receives this command, it is trig¬
gered regardless of front panel TRIG¬
GER switch setting.
GTL (Go to Local). The 4262A is set to
LOCAL by this command to enable
front panel control.
(1) DRDY (Data ReaDY): When the 4262A
completes a measurement cycle, this status
bit is set. This status is set without serial
polling if NOT DATA READY is set.
(2) SYN ERR (SYNtax ERRor): When the
4262A receives an erroneous Remote Pro¬
gram Code which is not listed in Table
3-60, this status bit is set.
(3) PASS (Self Test Pass): When PASS is dis¬
played in Self Test done by remote control,
this status bit is set.
(4) FAIL 1 (Self Test Fail 1): When FAIL 1 is
displayed in Self Test done by remote con¬
trol, this status bit is set.
(5) FAIL 2 (Self Test Fail 2): When FAIL 2 is
displayed in Self Test done by remote con¬
trol, this status bit is set.
(6) FAIL 3 (Self Test Fail 3): When FAIL 3 is
displayed in Self Test done by remote con¬
trol, this status bit is set.
3-33