SQ Cable Device

SQDF-B 1.2GHz Diplex Filter is a complete diplex filter with 75 Ohm at all ports. This filter isolates the forward and reverse bands so that the two signals can share the same coax band width. The reverse path frequencies pass through the low-pass filter which has a cutoff frequency of 65/85/204 MHz, and the forward path frequencies pass through the high-pass filter which has a cutoff frequency of 87/105/258 MHz. The high-pass filter works up to 1.2 GHz. Each of these filters, together with additional filtering provided on the amplifier motherboards, has enough isolation to prevent the amplifier from oscillating. It also provides enough isolation so that there is no interference between the forward and reverse path.

These accessories can be used for nodes, amplifiers, line extenders, etc.

Item	Units	65 / 87		85 / 105		204 / 258
FrequencyRange	MHz	5 - 65 / 87 - 1218		5 - 85 / 105 - 1218		5 - 204 / 258 - 1218
Insertion Loss	dB	0.2 (Min)	@5-65M @87-1218M	0.2 (Min)	@5-85M @105-1218M	0.2 (Min)	@5-204M @258-1218M
Insertion Loss	dB	1.5 (Max)	@5-65M @87-1218M	1.5 (Max)	@5-85M @105-1218M	1.5 (Max)	@5-204M @258-1218M
Isolation	dB	40	@5-65M	38	@5-85M	30	@5-130M
		35	@65-87M	26	@85-105M	26	@130-258M
		38	@87-1002M	43	@105-1002M	38	@258-1002M
		30	@1002-1218M	40	@1002-1218M	35	@1002-1218M
Return Loss	dB	20	@5-65M @87-1002M	20	@5-85M @105-1002M	20	@5-204M @258-1002M
Return Loss	dB	17	@1002-1218M	17	@1002-1218M	17	@1002-1218M
Impedance	Ω	75

Note: Unless otherwise noted, all specifications reflect typical performance and are referenced to 68°F (20°C).

Description	Part Number
SQDF-B 1.2 GHz 65/87 SMD Diplex Filter	9909000100
SQDF-B 1.2 GHz 65/87 (M) SMD Diplex Filter	9909000200
SQDF-B 1.2 GHz 85/105 SMD Diplex Filter	9909000101
SQDF-B 1.2 GHz 85/105 (M) SMD Diplex Filter	9909000201
SQDF-B 1.2 GHz 204/258 SMD Diplex Filter	9909000102
SQDF-B 1.2 GHz 204/258 (M) SMD Diplex Filter	9909000202

DF-B 1.2 GHz Diplex Filter

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