diff --git a/ddbridge/ddbridge-main.c b/ddbridge/ddbridge-main.c
index f84536c..631ad86 100644
--- a/ddbridge/ddbridge-main.c
+++ b/ddbridge/ddbridge-main.c
@@ -312,6 +312,7 @@ static int __devinit ddb_probe(struct pci_dev *pdev,
 	dev->link[0].ids.subvendor = id->subvendor;
 	dev->link[0].ids.subdevice = pdev->subsystem_device;
 	dev->link[0].ids.devid = (id->device << 16) | id->vendor;
+	dev->link[0].ids.revision = pdev->revision;
 
 	dev->link[0].dev = dev;
 	dev->link[0].info = get_ddb_info(id->vendor, id->device,
diff --git a/ddbridge/ddbridge-modulator.c b/ddbridge/ddbridge-modulator.c
index 5b4b794..986cf2f 100644
--- a/ddbridge/ddbridge-modulator.c
+++ b/ddbridge/ddbridge-modulator.c
@@ -2029,6 +2029,9 @@ static int mod_init_sdr_iq(struct ddb *dev)
 
 	ddbwritel(dev, 0x01, 0x240);
 
+	if (dev->link[0].ids.revision == 1)
+		return 0;
+
 	//mod3_set_base_frequency(dev, 602000000);
 	dev->mod_base.frequency = 570000000;
 	for (i = 0; i < streams; i++) {
diff --git a/ddbridge/ddbridge.h b/ddbridge/ddbridge.h
index 7002590..c986e6a 100644
--- a/ddbridge/ddbridge.h
+++ b/ddbridge/ddbridge.h
@@ -143,6 +143,7 @@ struct ddb_ids {
 	u32 regmapid;
 	u32 devid;
 	u32 mac;
+	u8 revision;
 };
 
 struct ddb_info {