M
O
D
I
F
I
C
A
T
I
O
N
R
E
C
O
M
M
E
N
D
E
D
–
M
M
C
C
C
O
O
O
O
O
R
R
R
D
D
R
R
R
I
F
I
C
A
T
I
O
N
R
E
C
O
M
M
E
N
D
I
F
I
C
A
T
I
O
N
R
E
C
O
M
M
E
C
T
S
M
A
N
U
F
A
C
T
E
E
C
C
T
T
S
S
M
A
N
U
A
N
U
F
F
M
A
A
C
C
T
T
U
U
U
E
R
R
R
N
I
I
I
N
N
N
D
G
G
G
E
E
D
–
D
–
O
R
D
E
S
I
G
N
D
E
F
E
C
T
S
O
R
D
E
S
I
G
N
D
E
F
O
R
D
E
S
I
G
N
D
E
F
E
E
C
C
T
T
S
S
E5070A-03
S E R V I C E N O T E
Supersedes:
NONE
E5070A ENA Series Network Analyzer, 300 kHz to 3 GHz
Serial Numbers: JP1KJ00000 / JP1KJ00138
Handler I/O Port Malfunction Due to TTL-Low Level Threshold Voltage Anomaly
To Be Performed By: Agilent-Qualified Personnel
Parts Required:
P/N Description Qty.
E5070-61006 HANDLER I/O BOARD 1
ADMINISTRATIVE INFORMATION
SERVICE NOTE CLASSIFICATION:
ACTION [[]] IMMEDIATELY STANDARDS:
CATEGORY: X ON SPECIFIED FAILURE LABOR: 0.5 Hours
[[]] AGREEABLE TIME
LOCATION [[]] CUSTOMER INSTALLABLE SERVICE [[]] RETURN USED [[]] RETURN
CATEGORY: [[]] ON-SITE INVENTORY: [[]] SCRAP PARTS: X SCRAP
X SERVICE CENTER [[]] SEE TEXT [[]] SEE TEXT
AVAILABILITY: PRODUCT’S SUPPORT LIFE AGILENT RESPONSIBLE UNTIL: January 2005
AUTHOR: TO PRODUCT LINE: WN
ADDITIONAL INFORMATION:
© AGILENT TECHNOLOGIES, INC. 2003
PRINTED IN U.S.A.
January 30, 2003
MODIFICATION RECOMMENDED
Page 1 of 2
Page 2 of 2 E5070A-03
Situation:
The 24-bit handler I/O of the E5070A units with the specified serial numbers may not function
normally. Due to the possible threshold-voltage anomaly of TTL input circuit at either of the I/O pins
2, 18 and 22 through 29, the handler I/O port may ignore the “Low” state of control input signals.
When the threshold voltage for TTL-Low level is too low (lower than 0.5 V), it is possible that control
input signal does not cross the threshold voltage (VLTH) though the “Low” level of the signal is
within the recommended voltage range (0 V to 0.5 V). As a result, a handler interface error occurs. See
Figure 1.
Old version of the E5070A/E5071A Programmer’s Guide has an error concerning the
Note:
recommended voltage range for the “Low” level of input signal. The correct voltage range is 0 V to
0.5 V.
Solution/Action:
When the threshold voltage of the handler I/O (either of the I/O pins) is too low, replace the A23
Handler I/O board with new one (P/N E5070-61006).
High
Figure 1. Threshold voltage anomaly
Low
H and ler I / O input s ignal
0.5 V
LTH
V
0V
Loading...