Can VeEX MTX150 Test Set Be Used To Test EIA/TIA-530 (RS-530) Datacom Links?

Technically YES, using the RS-449 Datacom test mode, since the signals are compatible with RS-530. However, we don't offer a DB25 test cable for RS-530. A DB37-to-DB25 adapter can easily be made, to match the specific pin-out of the DUT.

Although the MTX150 does not offer a test mode selection for EIA-530, TIA-530, RS-530 or RS530, the RS-499 serial interface shares the same signals and it can be used to test RS-530 links. The typical RS-530 interface uses a DB25 connector, while the RS-449 cable supplied by VeEX uses DB37 connector. So, a DVI-to-DB25 or DB37-to-DB25 adapter would be required. For BER testing, the simplest approach would be to use VeEX's RS-449 DTE cable and a simpler passive RS449/DCE(female)-to-RS530/DTE(male) adapter. Since both interfaces and pin-outs are standard, it should not be difficult to find a commercially available one.

Simplified diagram showing an MTX150 test set with an RS-449 datacom cable and an DB37-to-DB25 adapter for RS530 datacom interface

However, there are different versions of the RS-530 interface and connectors, which makes it difficult to offer a single native test cable for it. That is why we recommend making adapters for the DB37 RS449 cable or adapter cables directly from the DVI connector to RS-530, with the required connector and pin-out for the device under test (DUT).

Suggested RS449-to-RS530 DTE Adapter

The following suggested wiring scheme, from DB37 RS449 DTE to DB25 RS530 DTE, is to be used along with VeEX's RS449 DTE (DB37 male) Test Cable (P/N: F02-00-016G). Left side represents a DB37 female connector. Right side representa a DB25 male connector.

Suggested wiring map for an RS449 DTE (DB37 female) to RS530 DTE (DB25 male) datacom adapter.

Test Set's Configurable Datacom Connector

VeEX's MTX150 Connector Panel view

When ordered with the Datacom testing (hardware) option, the MTX150 comes equipped with a female 29-pin MicroCross connector (DVI style). The port can be configured as DTE or DCE. This is the generic pin-out:

29-pin MicroCross (DVI) Connector used as the main configurable datacom interface

TX130E & MTX150 DVI Connector (Female)
Pin	Signal
1	TXC_RXC_A
2	CTS_A
3	DSR_A
4	DCD_A
5	RI_RL
6	LL_TM
7	RTS_A
8	DTR_A
9	TXC_RXC_B
10	CTS_B
11	DSR_B
12	DCD_B
13	TM_LL
14	RL_RI
15	RTS_B
16	DTR_B
17	RXC_A
18	RXC_B
19	RXD_A
20	RXD_B
21	TXD_B
22	TXD_A
23	TXCE_B
24	TXCE_A
C1	Ground
C2	Ground
C3	Ground
C4	Ground
C5	Ground

RS530 DTE Connector Pin-out (DB25)

Ordering Part Number: N/A

DB25 DTE (male) Connector

Pin	Signal	Description
1		Shield
2	TxD (A)	Transmitted Data
3	RxD (A)	Received Data
4	RTS (A)	Request To Send
5	CTS (A)	Clear To Send
6	DSR (A)	Data Set Ready
7	SGND	Signal Ground
8	DCD (A)	Data Carrier Detect
9		Receive Signal Element Timing DCE (B)
10	DCD (B)	Data Carrier Detect (B)
11		Transmit Signal Element Timing DTE (B)
12		Transmit Signal Element Timing DCE (B)
13	CTS (B)	Clear To Send (B)
14	TxD (B)	Transmit Data (B)
15		Transmit Signal Element Timing DCE (A)
16	RxD (B)	Receive Data (B)
17		Receive Signal Element Timing DCE (A)
18	LL	Local Loopback
19	RTS (B)	Request To Send (B)
20	DTR (A)	Data Terminal Ready (A)
21	RL	Remote Loopback
22	DSR (B)	Data Set Ready (B)
23	DTR (B)	Data Terminal Ready (B)
24		Transmit Signal Element Timing DTE (A)
25		Test Mode

VeEX RS449 DTE Test Cable (DVI-to-DB37)

Ordering Part Number: F02-00-016G

RS499 DTE DB-37 Male Connector

DVI (Male)		DB-37 (Male)
Pin	Signal	Pin	Signal
1	TXC_RXC_A	5	ST(A)
2	CTS_A	9	CS(A)
3	DSR_A	11	DM(A)
4	DCD_A	13	RR(A)
5	RI_RL		***
6	TM_LL	10	LL
7	RTS_A	7	RS(A)
8	DTR_A	12	TR(A)
9	TXC_RXC_B	23	ST(B)
10	CTS_B	27	CS(B)
11	DSR_B	29	DM(B)
12	DCD_B	31	RR(B)
13	LL_TM	18	TM
14	RL_RI	14	RL
15	RTS_B	25	RS(B)
16	DTR_B	30	TR(B)
17	RXC_A	8	RT(A)
18	RXC_B	26	RT(B)
19	RXD_A	6	RD(A)
20	RXD_B	24	RD(B)
21	TXD_B	22	SD(B)
22	TXD_A	4	SD(A)
23	TXCE_B	35	TT(B)
24	TXCE_A	17	TT(A)
C1	GND
C2	GND
C3	GND
C4	GND
C5	GND	1	PGND
C5	GND	19	SGND
Shield	GND	Shield	GND

VeEX RS449 DCE Test Cable (DVI-to-DB37)

Ordering Part Number: F02-00-015G

RS449 DCE DB-37 Female Connector

DVI (Male)		DB-37 (Female)
Pin	Signal	Pin	Signal
1	TXC_RXC_A	5	ST(A)
2	CTS_A	7	RS(A)
3	DSR_A	12	TR(A)
4	DCD_A	13	RR(A)
5	RI_RL	14	RL
6	LL_TM	18	TM
7	RTS_A	9	CS(A)
8	DTR_A	11	DM(A)
9	TXC_RXC_B	23	ST(B)
10	CTS_B	25	RS(B)
11	DSR_B	30	TR(B)
12	DCD_B	31	RR(B)
13	TM_LL	10	LL
14	RL_RI		***
15	RTS_B	27	CS(B)
16	DTR_B	29	DM(B)
17	RXC_A	17	TT(A)
18	RXC_B	35	TT(B)
19	RXD_A	4	SD(A)
20	RXD_B	22	SD(B)
21	TXD_B	24	RD(B)
22	TXD_A	6	RD(A)
23	TXCE_B	26	RT(B)
24	TXCE_A	8	RT(A)
C1	GND
C2	GND
C3	GND
C4	GND
C5	GND	1	PGND
C5	GND	19	SGND
Shield	GND	Shield	GND