HP 1652B Getting Started Manual page 152

Figure 5-W. Protocol Pop-up Menu
HP 1652B/l653B
Front-Panel Reference
With less than a 5-wire interface, selecting None does not allow the
sending or receiving device to control how fast the data is being sent.
No control over the data flow increases the possibility of missing data
or transferring incomplete data. With a full 5-wire interface, selecting
None allows a hardware handshake to occur. With a hardware
handshake, hardware signals control data flow. The HP l3242G cable
allows the HP 1652B/l653BA to support hardware handshake.
With XON/XOFF, the receiver controls the data flow. By sending
XOFF (ASCII decemall9) over it's transmit data line, the reciever
requests that the sender disables data transmission. A subsequent
XON (ASCII decimal 17) allows the sending device to resume data
transmission
Data Bits. Data bits are the number of bits sent and received per
character that represent the binary code of that character. The HP
1652B/53B supports S-bit only.
Stop Bits. Stop bits are used to identify the end of the character. The
number of stop bits must be the same for both the controller and the
logic analyzer. The options are 1,15, or 2 stop bits per character. The
default setting is 1.
1
I
1 l/2
2
Figure
5-17.
Stop Bits Pop-up Menu
Parity. The parity bit detects errors as incoming characters are
received. If the parity bit does not match the expected value, the
character is assumed to be incorrectly received. The action taken when
an error is detected depends on how the interface and the device
program are configured.
I/O Menu
5-15